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The House of the Chultun in the ruins of the Mayan city of Tulum on the coast of the Caribbean Sea. Tulum National Park, Quintana Roo, Mexico. It is built over a chultun or cistern which holds water. A large Spiny-tailed Iguana basks on the top of the roof at right.

13845708 - The House of the Chultun in the ruins of the Mayan city of Tulum on the coast of the Caribbean Sea. Tulum National Park, Quintana Roo, Mexico. It is built over a chultun or cistern which holds water. A large Spiny-tailed Iguana basks on the top of the roof at right.

13845209 - The x-stream thrill ride on the top of Stratosphere tower

Detail of stonework and a door in Building IU at the pre-Columbian Zapotec ruins of Monte Alban in Oaxaca, Mexico. A temple was originally built on top of this platform. A UNESCO World Heritage Site.

13844770 - Detail of stonework and a door in Building IU at the pre-Columbian Zapotec ruins of Monte Alban in Oaxaca, Mexico. A temple was originally built on top of this platform. A UNESCO World Heritage Site.

Structure 17 or the Twins in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. The structure has two mirroring temples on the top of the pyramid. Viewed from the Oval Palace.

13844393 - Structure 17 or the Twins in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. The structure has two mirroring temples on the top of the pyramid. Viewed from the Oval Palace.

13836599 - A white-backed vulture, Gyps africanus, on a tree top. Voi, Tsavo West National Park, Kenya

13835546 - A great white pelican, Pelecanus onocrotalus, on a tree top. Khwai Concession, Okavango Delta, Botswana

13829983 - Clouds on top of the mountains in Mallorca, Spain

13811005 - Snowy Egret riding on top of American alligator, Florida

Kyaiktiyo Pagoda (Gold Rock), a small pagoda built on the top of a granite boulder covered with gold leaves pasted on by devotees, Mon State, Myanmar

13795680 - Kyaiktiyo Pagoda (Gold Rock), a small pagoda built on the top of a granite boulder covered with gold leaves pasted on by devotees, Mon State, Myanmar

71443437 - Table-shaped rock on top of the Geiersteinen, Wernersberg, Palatinate Forest, Rhineland-Palatinate, Germany

The passage of the SpaceX G2-9 Starlink group at about 3:30 am on May 15,2023,with the satellite chain still bright five days after its May 10 launch from Vandenburgh Air Force Base in California. This is most of the group,though a bright leader satellite did pass by a minute prior following the same path. The satellites were predicted to be magntiude 3.0 but appear as bright as first magnitude stars. This is looking northwest toward the Big Dipper at top. The glow of morning twilight brightening the sky. The satellite train is traveling from left to right here,from southwest to north. This is

13999617 - The passage of the SpaceX G2-9 Starlink group at about 3:30 am on May 15,2023,with the satellite chain still bright five days after its May 10 launch from Vandenburgh Air Force Base in California. This is most of the group,though a bright leader satellite did pass by a minute prior following the same path. The satellites were predicted to be magntiude 3.0 but appear as bright as first magnitude stars. This is looking northwest toward the Big Dipper at top. The glow of morning twilight brightening the sky. The satellite train is traveling from left to right here,from southwest to north. This is

This wide-field image frames the end stars of the Big Dipper's handle — Mizar at top,and Alkaid at bottom — and to also include in the frame the bright galaxies Messier 101 (at left) and Messier 51 (at lower right,aka the Whirlpool Galaxy). They are small on this image scale but the image serves for a finder chart illustration of the location of these galaxies relative to the Handle. The famous double star Mizar and Alcor is also obvious at top,as is the red giant star 83 Ursa Majoris. The field is 10° x 15°,so wider than binoculars.

13999239 - This wide-field image frames the end stars of the Big Dipper's handle — Mizar at top,and Alkaid at bottom — and to also include in the frame the bright galaxies Messier 101 (at left) and Messier 51 (at lower right,aka the Whirlpool Galaxy). They are small on this image scale but the image serves for a finder chart illustration of the location of these galaxies relative to the Handle. The famous double star Mizar and Alcor is also obvious at top,as is the red giant star 83 Ursa Majoris. The field is 10° x 15°,so wider than binoculars.

A moonlit scene of yellow balsamroot wildflowers blowing in the wind on a moonlit night in the Blakiston Valley in Waterton Lakes National Park,Alberta,May 29,2023. Blakiston Creek winds below toward the Waterton River. The waxing gibbous Moon just off frame at top provides the illumination. Moonlight is the same colour temperature as sunlight,so in a long exposure like this,a scene looks like daylight

13999115 - A moonlit scene of yellow balsamroot wildflowers blowing in the wind on a moonlit night in the Blakiston Valley in Waterton Lakes National Park,Alberta,May 29,2023. Blakiston Creek winds below toward the Waterton River. The waxing gibbous Moon just off frame at top provides the illumination. Moonlight is the same colour temperature as sunlight,so in a long exposure like this,a scene looks like daylight

This is the "Leo Trio" or Leo Triplet of spiral galaxies,that includes two Messier galaxies: M65 (lower right),M66 (lower left),along with the edge-on spiral NGC 3628 (top). The galaxy NGC 3593 is at right. A number of other faint 15th-magnitude IC and PGC galaxies are also in the frame as tiny fuzzy spots hard to distinguish from stars at this scale. The Class K3 orange giant star 73 or n Leonis is at right.

13998870 - This is the "Leo Trio" or Leo Triplet of spiral galaxies,that includes two Messier galaxies: M65 (lower right),M66 (lower left),along with the edge-on spiral NGC 3628 (top). The galaxy NGC 3593 is at right. A number of other faint 15th-magnitude IC and PGC galaxies are also in the frame as tiny fuzzy spots hard to distinguish from stars at this scale. The Class K3 orange giant star 73 or n Leonis is at right.

A framing of the converging rays of aurora overhead at the magnetic zenith,a little south of the true zenith at 90° altitude. This was the superb Kp6 to 7 display on March 23,2023,with the aurora in a pulsating mode rather than forming rippling curtains. Leo is just below the convergence point. The Big Dipper is at top. At this time later in the display the rays showed a lot of red as well as green. A short exposure helped freeze the rapid pulsations and capture the structure.

13998745 - A framing of the converging rays of aurora overhead at the magnetic zenith,a little south of the true zenith at 90° altitude. This was the superb Kp6 to 7 display on March 23,2023,with the aurora in a pulsating mode rather than forming rippling curtains. Leo is just below the convergence point. The Big Dipper is at top. At this time later in the display the rays showed a lot of red as well as green. A short exposure helped freeze the rapid pulsations and capture the structure.

Comet C/2022 E3 (ZTF) on the night of January 22/23,2023 when it was in Draco,with it near the reddish star Edasich (aka Iota Draconis) at top,and the edge-on galaxy NGC 5907 below the comet. To the right of that galaxy is NGC 5866,aka M102. The dust tail of the comet was showing a strong anti-tail spike ahead of the comet's greenish coma,as this was two days before we crossed the plane of the comet's orbit when we would see its dust tail "edge-on." The coma of the comet is strongly cyan or green from glowing diatomic carbon molecules,common for comets. There was little sign of the blue ion ta

13998387 - Comet C/2022 E3 (ZTF) on the night of January 22/23,2023 when it was in Draco,with it near the reddish star Edasich (aka Iota Draconis) at top,and the edge-on galaxy NGC 5907 below the comet. To the right of that galaxy is NGC 5866,aka M102. The dust tail of the comet was showing a strong anti-tail spike ahead of the comet's greenish coma,as this was two days before we crossed the plane of the comet's orbit when we would see its dust tail "edge-on." The coma of the comet is strongly cyan or green from glowing diatomic carbon molecules,common for comets. There was little sign of the blue ion ta

The Heart Nebula (aka IC 1805) at right, and the Soul Nebula (aka IC 1848) at left, in Cassiopeia. The round nebula at top right is NGC 896. The star cluster at right embedded in the Heart Nebula is NGC 1027. Shot from home in Alberta on November 21, 2019.

13900520 - The Heart Nebula (aka IC 1805) at right, and the Soul Nebula (aka IC 1848) at left, in Cassiopeia. The round nebula at top right is NGC 896. The star cluster at right embedded in the Heart Nebula is NGC 1027. Shot from home in Alberta on November 21, 2019.

The Scutum Starcloud (at top) in the Milky Way, with the Milky Way also bright to the south in Serpens. The nebulas M16 and M17 are at the bottom of the field. The bright star cluster M11, the Wild Duck Cluster, is at the top on the northern edge of the Scutum Starcloud. The area is rife with dark nebulas and dust lanes.

13899972 - The Scutum Starcloud (at top) in the Milky Way, with the Milky Way also bright to the south in Serpens. The nebulas M16 and M17 are at the bottom of the field. The bright star cluster M11, the Wild Duck Cluster, is at the top on the northern edge of the Scutum Starcloud. The area is rife with dark nebulas and dust lanes.

Horizon-to-zenith panorama of the northern winter sky, from Canis Major in the south just above the horizon to Cassiopeia past the zenith at the top of the frame. Capella is near the zenith above centre. The extra star at left is Mars, just 10 days past opposition, on Feb. 9, 2010, when it was just above the Beehive star cluster. Taken with Canon 5DMkII and Canon 15mm lens, at f/5 for stack of 3 exposures x 4.5 minutes each at ISO 800. Two exposures had frost on the lens, thus the big star haloes. Taken from southern Alberta, Canada.

13899690 - Horizon-to-zenith panorama of the northern winter sky, from Canis Major in the south just above the horizon to Cassiopeia past the zenith at the top of the frame. Capella is near the zenith above centre. The extra star at left is Mars, just 10 days past opposition, on Feb. 9, 2010, when it was just above the Beehive star cluster. Taken with Canon 5DMkII and Canon 15mm lens, at f/5 for stack of 3 exposures x 4.5 minutes each at ISO 800. Two exposures had frost on the lens, thus the big star haloes. Taken from southern Alberta, Canada.

Jupiter (at right) and Saturn (at left) shining brightly in the sky and reflected in the still waters of Maskinonge Lake at Waterton Lakes National Park, Alberta, on June 17/18, 2018. The Milky Way is at left, Scorpius is at centre, and two satellite trails are at top. The sky is blue with solstice twilight. The trees on the opposite shore are charred from the Kenow Fire in September 2017. In the distance are Sofa Mountain and Viny Peak.

13898367 - Jupiter (at right) and Saturn (at left) shining brightly in the sky and reflected in the still waters of Maskinonge Lake at Waterton Lakes National Park, Alberta, on June 17/18, 2018. The Milky Way is at left, Scorpius is at centre, and two satellite trails are at top. The sky is blue with solstice twilight. The trees on the opposite shore are charred from the Kenow Fire in September 2017. In the distance are Sofa Mountain and Viny Peak.

July 21, 2009 total solar eclipse near third contact as shadow leaves the horizon and is about to hit the Sun coming toward us. Totality is about to end. Taken from Northern Cook Islands, at sea on m/s Paul Gauguin. Using 20Da and 28-105mm lens at 60mm at f/5 and ISO100. Mercury, blurred ny ship's motion, at top.

13898194 - July 21, 2009 total solar eclipse near third contact as shadow leaves the horizon and is about to hit the Sun coming toward us. Totality is about to end. Taken from Northern Cook Islands, at sea on m/s Paul Gauguin. Using 20Da and 28-105mm lens at 60mm at f/5 and ISO100. Mercury, blurred ny ship's motion, at top.

13897822 - The area near Sirius (at lower right) including the Seagull Nebula (at top left) also called IC 2177, on the Canis Major-Monoceros border.

A 360° fish-eye view of a sky-filling aurora on March 4, 2022 taken from the Churchill Northern Studies Centre, Churchill, Manitoba. This is looking north but with the lens taking in most of the sky including the zenith at top where the curtains are converging and swirling, and near the Big Dipper. Note the subtle nitrogen pink fringe along the lower curtain.

13897565 - A 360° fish-eye view of a sky-filling aurora on March 4, 2022 taken from the Churchill Northern Studies Centre, Churchill, Manitoba. This is looking north but with the lens taking in most of the sky including the zenith at top where the curtains are converging and swirling, and near the Big Dipper. Note the subtle nitrogen pink fringe along the lower curtain.

13848738 - The House of the Chultun in the ruins of the Mayan city of Tulum on the coast of the Caribbean Sea. Tulum National Park, Quintana Roo, Mexico. It is built over a chultun or cistern which holds water. A large Spiny-tailed Iguana basks on the top of the roof at center.

Structure 17 or the Twins at right in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. The structure has two mirroring temples on the top of the pyramid.

13848536 - Structure 17 or the Twins at right in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. The structure has two mirroring temples on the top of the pyramid.

Scrambling Around Segara Anak Lake in Mount Rinjani Crater, Lombok, Indonesia. After climbing down into Mount Rinjani crater on day two, you get the opportunity to walk around the edge of Segara Anak Lake. Looking up at the 3726m summit of Mount Rinjani, the second highest volcano in Indonesia, the thought of reaching the top seems a long way off.

13848158 - Scrambling Around Segara Anak Lake in Mount Rinjani Crater, Lombok, Indonesia. After climbing down into Mount Rinjani crater on day two, you get the opportunity to walk around the edge of Segara Anak Lake. Looking up at the 3726m summit of Mount Rinjani, the second highest volcano in Indonesia, the thought of reaching the top seems a long way off.

People relaxing on Dubrovnik beach, opposite Fort Lovrijenac, Dubrovnic, Croatia. This is a photo of people relaxing on a small beach in Dubrovnik, opposite Fort Lovrijenac, Croatia. Fort Lovrijenac is a large fort situated on top of a rocky cliff, just outside Dubrovnik Old Town.

13847966 - People relaxing on Dubrovnik beach, opposite Fort Lovrijenac, Dubrovnic, Croatia. This is a photo of people relaxing on a small beach in Dubrovnik, opposite Fort Lovrijenac, Croatia. Fort Lovrijenac is a large fort situated on top of a rocky cliff, just outside Dubrovnik Old Town.

13847381 - Temples III, IV, and V on top of a pyramid in the ruins of the Mayan city of Bonampak in Chiapas, Mexico.

13845937 - Lots of of pollen in this bee's leg, on the top right corner you can see part of a parasitic mite on the wing

A Black Spiny-tailed Iguana, Ctenosaura similis, on the top of the Palace or El Palacio in the ruins of the Mayan city of Labna are part of the Pre-Hispanic Town of Uxmal UNESCO World Heritage Center in Yucatan, Mexico.

13845270 - A Black Spiny-tailed Iguana, Ctenosaura similis, on the top of the Palace or El Palacio in the ruins of the Mayan city of Labna are part of the Pre-Hispanic Town of Uxmal UNESCO World Heritage Center in Yucatan, Mexico.

13845038 - Mount Hood and wildflowers in meadow on Bald Mountain from Top Spur Trail; Mount Hood National Forest, Oregon.

13825098 - Roman colonnade on the top, general view of Archaeological site, Byblos, Lebanon

13792148 - Looking Down Road At Dusk To Old Farmhouse On Hill Top Near Village Of Pienza

71430027 - The statue of Victoria on top of the Victory column in Belin, Germany.

A panorama of the Milky Way on a February winter night over the Badlands of Dinosaur Provincial Park,Alberta. The panorama extends from Canis Major low on the horizon to Perseus at top near the zenith. Orion is at right of centre,with Gemini to the left and Taurus and Auriga above Orion. Mars is the bright reddish object in Taurus aboce similarly coloured but dimmer Aldebaran,itself amid the Hyades star cluster. The blue Pleiades is at upper right. Sirius is the bright star at bottom. The image takes in the complete Winter Hexagon (aka the Winter Circle) of bright stars.

13999701 - A panorama of the Milky Way on a February winter night over the Badlands of Dinosaur Provincial Park,Alberta. The panorama extends from Canis Major low on the horizon to Perseus at top near the zenith. Orion is at right of centre,with Gemini to the left and Taurus and Auriga above Orion. Mars is the bright reddish object in Taurus aboce similarly coloured but dimmer Aldebaran,itself amid the Hyades star cluster. The blue Pleiades is at upper right. Sirius is the bright star at bottom. The image takes in the complete Winter Hexagon (aka the Winter Circle) of bright stars.

This is the field near the bright star Gamma Cassiopeiae,or Navi,at left,with the reflection nebulas IC 63 (bottom) and IC 59,aka the Ghost of Cassiopeia,above the bright star. At lower right is the star cluster NGC 129,while at top centre is a loose cluster NGC 225,aka the Sailboat Cluster. It has a small patch of reflection nebulosity near it identified as van denBurgh 4 in the Tri-Atlas. It was not marked on other atlases. Many orange giant stars pervade the area.

13999611 - This is the field near the bright star Gamma Cassiopeiae,or Navi,at left,with the reflection nebulas IC 63 (bottom) and IC 59,aka the Ghost of Cassiopeia,above the bright star. At lower right is the star cluster NGC 129,while at top centre is a loose cluster NGC 225,aka the Sailboat Cluster. It has a small patch of reflection nebulosity near it identified as van denBurgh 4 in the Tri-Atlas. It was not marked on other atlases. Many orange giant stars pervade the area.

This is the active Sun on July 9,2023,with numerous sunspot groups across the disk,including the very large region AR3363 at lower left that had just turned into view. At top is the pair of spots comprising AR3361,and at lower right another pair AR3366. Bright faculae are visible on the darker limbs of the Sun as well as the general fine granulation across the surface. North is approximately up here.

13999448 - This is the active Sun on July 9,2023,with numerous sunspot groups across the disk,including the very large region AR3363 at lower left that had just turned into view. At top is the pair of spots comprising AR3361,and at lower right another pair AR3366. Bright faculae are visible on the darker limbs of the Sun as well as the general fine granulation across the surface. North is approximately up here.

A 180° panorama of the aurora curtains across the northern sky,on February 22,2023,from the grounds northeast of the Churchill Northern Studies Centre,in Churchill,Manitoba. This was a Kp5 level aurora this night,active from twilight on and peaking here at about 9:30 pm. Polaris is at top just left of centre. Cassiopeia is at left,the Big Dipper at right.

13998717 - A 180° panorama of the aurora curtains across the northern sky,on February 22,2023,from the grounds northeast of the Churchill Northern Studies Centre,in Churchill,Manitoba. This was a Kp5 level aurora this night,active from twilight on and peaking here at about 9:30 pm. Polaris is at top just left of centre. Cassiopeia is at left,the Big Dipper at right.

$El Castillo, Structure 6, with tourists on top in the Xunantunich Archeological Reserve in Belize.\n$

13926910 - El Castillo, Structure 6, with tourists on top in the Xunantunich Archeological Reserve in Belize.\n

The aurora borealis, the Northern Lights, on Feb 21, 2015, from tne Churchill Northern Studies Centre, Churchill, Manitoba, This is looking north with an ultrawide 15mm lens taking in about half the sky from west (left) to east (right) and with the zenith near the top. This is a 15-second exposure at f/2.8 and ISO 3200 with the Canon 6D camera. This frame is part of a 360-frame time lapse taken over 1.5 hours.

13900598 - The aurora borealis, the Northern Lights, on Feb 21, 2015, from tne Churchill Northern Studies Centre, Churchill, Manitoba, This is looking north with an ultrawide 15mm lens taking in about half the sky from west (left) to east (right) and with the zenith near the top. This is a 15-second exposure at f/2.8 and ISO 3200 with the Canon 6D camera. This frame is part of a 360-frame time lapse taken over 1.5 hours.

The summer Milky Way in Cygnus, with the Summer Triangle stars rising over the Hoodoos formations on Highway 10 near Drumheller, Alberta. A low-level aurora display tints the sky magenta and blue at left, making for an unusually colourful sky. The bright stars are: Vega is at top, Deneb at centre and Altair at bottom right.

13900142 - The summer Milky Way in Cygnus, with the Summer Triangle stars rising over the Hoodoos formations on Highway 10 near Drumheller, Alberta. A low-level aurora display tints the sky magenta and blue at left, making for an unusually colourful sky. The bright stars are: Vega is at top, Deneb at centre and Altair at bottom right.

A selfie of me observing Mars, the bright object at top, in Taurus, on a mild winter night from home on December 9, 2022. Mars was then two days past opposition and at its brightest. The waning gibbous Moon is the bright glow at left, lighting the sky blue and the snowy landscape below with sparkling moonlight. Orion is rising behind me, while Gemini is at far left.

13899810 - A selfie of me observing Mars, the bright object at top, in Taurus, on a mild winter night from home on December 9, 2022. Mars was then two days past opposition and at its brightest. The waning gibbous Moon is the bright glow at left, lighting the sky blue and the snowy landscape below with sparkling moonlight. Orion is rising behind me, while Gemini is at far left.

The line-up of three evening planets in the southwest twilight sky, on December 17, 2021 — with Jupiter at top left, Venus at bottom right, and dimmer Saturn in the middle, all defining the line of the ecliptic in the cold winter sky this night. The stars of Capricornus are at centre.

13899600 - The line-up of three evening planets in the southwest twilight sky, on December 17, 2021 — with Jupiter at top left, Venus at bottom right, and dimmer Saturn in the middle, all defining the line of the ecliptic in the cold winter sky this night. The stars of Capricornus are at centre.

Orion and the winter stars and constellations rising in the light of a first quarter Moon on December 2, 2019. This was from home in Alberta. Orion is above the trees with Aldebaran in Taurus and the Pleiades above him. At top left is the star Capella and the constellation of Auriga. At left of centre are Castor and Pollux in Gemini. Just rising amid the trees is Procyon in Canis Minor. Sirius and Canis Major had not yet risen. The timing nicely captures 4 of the sky’s best star clusters in a row across the sky, with the Beehive just rising at lower left, the Hyades at upper right, and the Ple

13899432 - Orion and the winter stars and constellations rising in the light of a first quarter Moon on December 2, 2019. This was from home in Alberta. Orion is above the trees with Aldebaran in Taurus and the Pleiades above him. At top left is the star Capella and the constellation of Auriga. At left of centre are Castor and Pollux in Gemini. Just rising amid the trees is Procyon in Canis Minor. Sirius and Canis Major had not yet risen. The timing nicely captures 4 of the sky’s best star clusters in a row across the sky, with the Beehive just rising at lower left, the Hyades at upper right, and the Ple

Particularly large groups of sunspots on the Sun on September 4, 2017. The group at bottom is AR 2673, the group at top is 2674. The small spot at left on the emerging limb is AR 2677, while the groups disappearing at right are AR 2675 (top) and AR 2776.

13899289 - Particularly large groups of sunspots on the Sun on September 4, 2017. The group at bottom is AR 2673, the group at top is 2674. The small spot at left on the emerging limb is AR 2677, while the groups disappearing at right are AR 2675 (top) and AR 2776.

Comet Lovejoy, C/2014 Q2 amid the clusters, nebulas and dark dust clouds of Taurus and Perseus, on Friday, January 16, 2016. Its long blue ion tail stretches back at least 15°, almost to the open cluster NGC 1647 on Taurus at the left edge. At centre is the Pleiades star cluster, M45; at top right is the red California Nebula, NGC 1499, in Perseus, while the field is filled with the dark dusty lanes of the Taurus Dark Clouds. At left is the red giant star Aldebaran amid the V-shaped Hyades star cluster.

13899076 - Comet Lovejoy, C/2014 Q2 amid the clusters, nebulas and dark dust clouds of Taurus and Perseus, on Friday, January 16, 2016. Its long blue ion tail stretches back at least 15°, almost to the open cluster NGC 1647 on Taurus at the left edge. At centre is the Pleiades star cluster, M45; at top right is the red California Nebula, NGC 1499, in Perseus, while the field is filled with the dark dusty lanes of the Taurus Dark Clouds. At left is the red giant star Aldebaran amid the V-shaped Hyades star cluster.

$The region of nebulosity on the Cepheus-Cassiopeia border with NGC 7822 (top) and Ced 214 (bottom). This is a stack of 15 x 7 minute exposures at f/4.4 with the 92mm apo refractor and filter-modified Canon 5D Mark II at ISO 800. Taken from New Mexico. Focus is a little soft.$

13898423 - The region of nebulosity on the Cepheus-Cassiopeia border with NGC 7822 (top) and Ced 214 (bottom). This is a stack of 15 x 7 minute exposures at f/4.4 with the 92mm apo refractor and filter-modified Canon 5D Mark II at ISO 800. Taken from New Mexico. Focus is a little soft.

$The Full Moon rising on December 22, 2018, the day after the winter solstice, in a perfectly clear sky and over the distant horizon to the northeast over the snow-covered prairie. Some cows are grazing at left! The top edge of the Moon has a green rim and the bottom edge a red rim, from atmospheric refraction. But it made for a Christmas-coloured Moon ornament on the horizon! The dark lunar mare and even the bright rays splashing from Tycho at bottom are visible.$

13898326 - The Full Moon rising on December 22, 2018, the day after the winter solstice, in a perfectly clear sky and over the distant horizon to the northeast over the snow-covered prairie. Some cows are grazing at left! The top edge of the Moon has a green rim and the bottom edge a red rim, from atmospheric refraction. But it made for a Christmas-coloured Moon ornament on the horizon! The dark lunar mare and even the bright rays splashing from Tycho at bottom are visible.

The 1910 Liberty Schoolhouse, a classic pioneer one-room school, on the Alberta prairie under the stars on a spring night, with an aurora dancing to the north. Moonlight provides the illumination. Cassiopeia is above the school. Polaris is at top.

13898166 - The 1910 Liberty Schoolhouse, a classic pioneer one-room school, on the Alberta prairie under the stars on a spring night, with an aurora dancing to the north. Moonlight provides the illumination. Cassiopeia is above the school. Polaris is at top.

The Dark Emu of aboriginal sky lore rising out of the Tasman Sea, from the south cost of Victoria, Australia. From Cape Conran on the Gippsland Coast. Carina is just above centre, Crux, the Southern Cross is at centre, and Centaurus is below Crux. The False Cross is at top.

13897737 - The Dark Emu of aboriginal sky lore rising out of the Tasman Sea, from the south cost of Victoria, Australia. From Cape Conran on the Gippsland Coast. Carina is just above centre, Crux, the Southern Cross is at centre, and Centaurus is below Crux. The False Cross is at top.

A bright green auroral arc with prominent red curtains, to the east in front of the winter stars rising. with bright Mars below centre and the Pleiades at top right. This was from home in Alberta on September 26, 2022.

13897557 - A bright green auroral arc with prominent red curtains, to the east in front of the winter stars rising. with bright Mars below centre and the Pleiades at top right. This was from home in Alberta on September 26, 2022.

13878750 - United Arab Emirates, Abu Dahbi, Empty Quarter, Liwa desert dune, Two people on top of sand dune

The stairway on the top of Building A in the ruins of the pre-Hispanic Zapotec city of Dainzu in the Central Valley of Oaxaca, Mexico. In the background is the ball court.

13848678 - The stairway on the top of Building A in the ruins of the pre-Hispanic Zapotec city of Dainzu in the Central Valley of Oaxaca, Mexico. In the background is the ball court.

View over George Town from Kek Lok Si Temple, Penang, Malaysia. Kek Lok Si Temple is located in the Air Itam area of Penang, an easy bus ride away from the UNESCO World Heritage Site of George Town, where most tourists stay. Being the Largest Buddhist Temple in Southeast Asia, Kek Lok Si Temple is quite a spectacle with stand out features such as the Pagoda of 10,000 Buddhas and thousands upon thousands of prayers attached to chinese lanterns lining the walk to the top, where you are greeted by views back over George Town, Penang. George Town, named after King George II is a city on Penang Isl

13847553 - View over George Town from Kek Lok Si Temple, Penang, Malaysia. Kek Lok Si Temple is located in the Air Itam area of Penang, an easy bus ride away from the UNESCO World Heritage Site of George Town, where most tourists stay. Being the Largest Buddhist Temple in Southeast Asia, Kek Lok Si Temple is quite a spectacle with stand out features such as the Pagoda of 10,000 Buddhas and thousands upon thousands of prayers attached to chinese lanterns lining the walk to the top, where you are greeted by views back over George Town, Penang. George Town, named after King George II is a city on Penang Isl

Pineapple Selling Boat at Can Tho Floating Market, Mekong Delta, Vietnam. Can Tho floating market is a hive of activity. Fruit piled high on the boats and market traders selling to each other as well as the passing tourists. Their are endless floating markets in the Mekong Delta, but Can Tho is one of the largest with hundreds of boats squeezing past each other every morning, before preparing for market again the next day. Each boat hangs an example of what they sell off the top of the boat so passers by know what they are selling.

13846770 - Pineapple Selling Boat at Can Tho Floating Market, Mekong Delta, Vietnam. Can Tho floating market is a hive of activity. Fruit piled high on the boats and market traders selling to each other as well as the passing tourists. Their are endless floating markets in the Mekong Delta, but Can Tho is one of the largest with hundreds of boats squeezing past each other every morning, before preparing for market again the next day. Each boat hangs an example of what they sell off the top of the boat so passers by know what they are selling.

Small stone rings set in the walls of the temples atop Structure 17 or the Twins in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. The structure has two mirroring temples on the top of the pyramid.

13846745 - Small stone rings set in the walls of the temples atop Structure 17 or the Twins in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. The structure has two mirroring temples on the top of the pyramid.

13836263 - A lioness, Panthera leo, on top of a termite mound. Masai Mara National Reserve, Kenya.

13824247 - Walkway on top of the Elephant Terrace, Angkor Thom, Angkor Archaeological Park, Siem Reap, Cambodia

Women cooking, restaurant, typical Colombian gastronomy, Street food, on the top of Cerro de Monserrate, next Santuario del Senor de Monserrate, Bogota, Colombia

13823983 - Women cooking, restaurant, typical Colombian gastronomy, Street food, on the top of Cerro de Monserrate, next Santuario del Senor de Monserrate, Bogota, Colombia

13811403 - Cross high on top of Flint Hills.

13793413 - Barred Owl Swoops Down To Catch A Mouse On Top Of The Snow, Ontario, Canada, Winter

A widefield view of Orion's Belt and Sword showing the complex of nebulosity in the area. The three Belt stars are at top (L to R): Alnitak,Alnilam and Mintaka,with the dark Horsehead Nebula (B33) below Alnitak. Above Alnitak is the pinkish Flame Nebula,NGC 2024. At bottom are Messiers 42 and 43,making up the Orion Nebula,with the bluish Running Man Nebula above it,aka NGC 1973-5-7. Above it is the star cluster NGC 1981. Messier 78 is just on frame at upper left. Numerous other bits of emission and reflection nebulas populate the field amid a backdrop of faint emission nebulosity. The stars ar

13998672 - A widefield view of Orion's Belt and Sword showing the complex of nebulosity in the area. The three Belt stars are at top (L to R): Alnitak,Alnilam and Mintaka,with the dark Horsehead Nebula (B33) below Alnitak. Above Alnitak is the pinkish Flame Nebula,NGC 2024. At bottom are Messiers 42 and 43,making up the Orion Nebula,with the bluish Running Man Nebula above it,aka NGC 1973-5-7. Above it is the star cluster NGC 1981. Messier 78 is just on frame at upper left. Numerous other bits of emission and reflection nebulas populate the field amid a backdrop of faint emission nebulosity. The stars ar

A selfie of me observing Mars,the bright reddish star at top,from home on January 4,2023,with Mars then still bright a month after opposition. The waxing gibbous Moon is the bright object at left. The Pleiades are above Mars; the Hyades and Aldebaran are below Mars. Orion and Sirius are rising in the background below. The telescope is the Starfield Optics Gear115 on the Astro-Physics Mach1 mount.

13998662 - A selfie of me observing Mars,the bright reddish star at top,from home on January 4,2023,with Mars then still bright a month after opposition. The waxing gibbous Moon is the bright object at left. The Pleiades are above Mars; the Hyades and Aldebaran are below Mars. Orion and Sirius are rising in the background below. The telescope is the Starfield Optics Gear115 on the Astro-Physics Mach1 mount.

The 1910 Liberty Schoolhouse, a pioneer one-room school, on the Alberta prairie near Majorville, in the moonlight with an aurora across the north. Polaris is at top left. Cassiopeia is above the school. The 8-day waxing Moon provides the illumination.

13900270 - The 1910 Liberty Schoolhouse, a pioneer one-room school, on the Alberta prairie near Majorville, in the moonlight with an aurora across the north. Polaris is at top left. Cassiopeia is above the school. The 8-day waxing Moon provides the illumination.

The autumn constellations of Cassiopeia (the W at lower centre) and Cepheus (at top) amid autumn aspens on a moonlit September evening. The Andromeda Galaxy, M31, is at lower right. I shot this from the Elbow Falls area in Kananaskis, Alberta. Illumination is from a waxing gibbous Moon.

13900197 - The autumn constellations of Cassiopeia (the W at lower centre) and Cepheus (at top) amid autumn aspens on a moonlit September evening. The Andromeda Galaxy, M31, is at lower right. I shot this from the Elbow Falls area in Kananaskis, Alberta. Illumination is from a waxing gibbous Moon.

The Zodiacal Light at dawn on an autumn morning, October 7, 2022. Orion, Sirius, and the winter Milky Way are at right; Mars is the bright object at top right. The Beehive star cluster is at centre embedded in the Light. Leo is rising at left. Bands of airglow tint the sky.

13899933 - The Zodiacal Light at dawn on an autumn morning, October 7, 2022. Orion, Sirius, and the winter Milky Way are at right; Mars is the bright object at top right. The Beehive star cluster is at centre embedded in the Light. Leo is rising at left. Bands of airglow tint the sky.

A panorama of the 7-day-old first quarter Moon on March 13, 2019, showing the full disk and extent of incredible detail along the terminator, the dividing line between the day and night sides of the Moon where the Sun is rising as seen from the surface of the Moon. Note the tiny points of light at the centres of some of the craters (particularly Alphonsus and Arzachel below centre) in the Southern Highlands from sunlight just catching the central peaks of those craters. At top in the north the slash of the Alpine Valley is obvious as well as the curve of the Apennine Mountains.

13897428 - A panorama of the 7-day-old first quarter Moon on March 13, 2019, showing the full disk and extent of incredible detail along the terminator, the dividing line between the day and night sides of the Moon where the Sun is rising as seen from the surface of the Moon. Note the tiny points of light at the centres of some of the craters (particularly Alphonsus and Arzachel below centre) in the Southern Highlands from sunlight just catching the central peaks of those craters. At top in the north the slash of the Alpine Valley is obvious as well as the curve of the Apennine Mountains.

13848964 - Mineral deposits on a cliff face near the Yagul Caves appear to mimic the roots of the tree on the cliff top. Oaxaca, Mexico.

Centre of New Zealand Sign at Nelson, South Island, New Zealand. Nelson, home to the 'Centre of New Zealand', is a very picturesque city at the top of South Island, New Zealand. Its location on the coast, combined with the surrounding hills and mountains give rise to its wide variety of beautiful landscapes and scenery.

13848649 - Centre of New Zealand Sign at Nelson, South Island, New Zealand. Nelson, home to the 'Centre of New Zealand', is a very picturesque city at the top of South Island, New Zealand. Its location on the coast, combined with the surrounding hills and mountains give rise to its wide variety of beautiful landscapes and scenery.

Dome Geodesique accommodation. Implanted on the ski slopes of Gourette at the top of the cable railway of Bézou. Gourette ski resort, Pyrenees Atlantiques, Aquitaine region, Ossau Valley, France

13848600 - Dome Geodesique accommodation. Implanted on the ski slopes of Gourette at the top of the cable railway of Bézou. Gourette ski resort, Pyrenees Atlantiques, Aquitaine region, Ossau Valley, France

13848472 - Pineapple Selling Boat at Can Tho Floating Market, Mekong Delta, Vietnam. Can Tho floating market is a hive of activity. Fruit piled high on the boats and market traders selling to each other as well as the passing tourists. Their are endless floating markets in the Mekong Delta, but Can Tho is one of the largest with hundreds of boats squeezing past each other every morning, before preparing for market again the next day. Each boat hangs an example of what they sell off the top of the boat so passers by know what they are selling.

The stairway to one of the partially restored ruins of the twin temples on top of Structure 17 in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico.

13848015 - The stairway to one of the partially restored ruins of the twin temples on top of Structure 17 in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico.

13846437 - The House of the Chultun in the ruins of the Mayan city of Tulum on the coast of the Caribbean Sea. Tulum National Park, Quintana Roo, Mexico. It is built over a chultun or cistern which holds water. A large Spiny-tailed Iguana basks on the top of the roof at right.

The partially restored ruins of the twin temples on top of Structure 17 with the large ruin of the Acropolis in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. Viewed from the top of the Oval Palace.

13846328 - The partially restored ruins of the twin temples on top of Structure 17 with the large ruin of the Acropolis in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. Viewed from the top of the Oval Palace.

13790087 - A Female Passenger On The Top Deck Of Cruise Ship Watching Sunset

The stars of the northern sky over Castle Mountain in Banff National Park,Alberta. This was June 6,2023 on a very clear night,but bright with blue summer twilight at this latitude of 51° N in June. The W of Cassiopeia and the Milky Way are at right. Polaris is at top.

13999530 - The stars of the northern sky over Castle Mountain in Banff National Park,Alberta. This was June 6,2023 on a very clear night,but bright with blue summer twilight at this latitude of 51° N in June. The W of Cassiopeia and the Milky Way are at right. Polaris is at top.

Venus (at top) and Jupiter in a close conjunction on the evening of March 2,2023,the day after their closest approach. They were one degree apart this night but were 1/2° apart the night before. I shot this on a hill near home in southern Alberta.

13999236 - Venus (at top) and Jupiter in a close conjunction on the evening of March 2,2023,the day after their closest approach. They were one degree apart this night but were 1/2° apart the night before. I shot this on a hill near home in southern Alberta.

This is a framing of the bright Messier spiral galaxy M106 at top,with a number of its companions and nearby galaxies in Canes Venatici. The edge-on spiral to the right of M106 is NGC 4217; the elongated spiral at upper right is NGC 4096; the edge-on spiral right of centre is NGC 4144; the more face-on spiral at bottom is NGC 4242. Many other NGC and PGC galaxies down to 15th magnitude dot the field.

13999105 - This is a framing of the bright Messier spiral galaxy M106 at top,with a number of its companions and nearby galaxies in Canes Venatici. The edge-on spiral to the right of M106 is NGC 4217; the elongated spiral at upper right is NGC 4096; the edge-on spiral right of centre is NGC 4144; the more face-on spiral at bottom is NGC 4242. Many other NGC and PGC galaxies down to 15th magnitude dot the field.

Cassiopeia nearly overhead on an autumn night, amid the pines at Athabasca Fall, Jasper National Park, Alberta. The Andromeda Galaxy is at top, Perseus is at upper right, and Cepheus and Cygnus at lower left.

13900157 - Cassiopeia nearly overhead on an autumn night, amid the pines at Athabasca Fall, Jasper National Park, Alberta. The Andromeda Galaxy is at top, Perseus is at upper right, and Cepheus and Cygnus at lower left.

A composite of several exposures to stack images of five Geminid meteors into a wide view of the winter sky with Comet Wirtanen at upper right in Taurus, taken on December 12, 2018. The meteors are shooting away from the radiant point in Gemini near the bluish-white star Castor at left. The Milky Way runs vertically through the frame from Auriga at top to past Orion at bottom.

13899263 - A composite of several exposures to stack images of five Geminid meteors into a wide view of the winter sky with Comet Wirtanen at upper right in Taurus, taken on December 12, 2018. The meteors are shooting away from the radiant point in Gemini near the bluish-white star Castor at left. The Milky Way runs vertically through the frame from Auriga at top to past Orion at bottom.

Orion and the winter sky with Venus, setting into the western twilight, over Turret Arch in Arches National Park, Utah, on April 6, 2015. Venus is the bright object at right under the Pleaides. Sirius is the bright star at left, with Procyon the bright star ar top left.

13899070 - Orion and the winter sky with Venus, setting into the western twilight, over Turret Arch in Arches National Park, Utah, on April 6, 2015. Venus is the bright object at right under the Pleaides. Sirius is the bright star at left, with Procyon the bright star ar top left.

The colourful region around yellow Antares (bottom) in Scorpius and blue Rho Ophiuchi (top) in Ophiuchus. The nebulas are largely reflection nebulas, taking on the colour of the stars embedded in the nebulas. However, the field also contains a lot of emission nebulosity, hydrogen gas glowing red and magenta. Plus there are fingers of brown dark dusty nebulosity. It is one of the most colourful regions of the sky.

13899016 - The colourful region around yellow Antares (bottom) in Scorpius and blue Rho Ophiuchi (top) in Ophiuchus. The nebulas are largely reflection nebulas, taking on the colour of the stars embedded in the nebulas. However, the field also contains a lot of emission nebulosity, hydrogen gas glowing red and magenta. Plus there are fingers of brown dark dusty nebulosity. It is one of the most colourful regions of the sky.

Orion and Taurus rising in the moonlight over a snowy landscape at at my house in southern Alberta, on a very cold and frosty -20° C night on January 3, 2017. Illumination is from the waxing crescent Moon. Orion is below with Taurus at top.

13898473 - Orion and Taurus rising in the moonlight over a snowy landscape at at my house in southern Alberta, on a very cold and frosty -20° C night on January 3, 2017. Illumination is from the waxing crescent Moon. Orion is below with Taurus at top.

$Messier 81 (the spiral galaxy below) and M82 (the irregular galaxy on top) in Ursa Major. M81 is Bode’s Galaxy, while M82 is the Cigar Galaxy. The galaxy at bottom left is NGC 3077 This is a stack of 10 x 10-minute exposures with the Canon EOS Ra camera at ISO 800 through the Astro-Physics 130mm apo refractor at f/6 with the 6x7 field flattener lens. Taken April 24/25, 2020. North is up in this view.$

13898077 - Messier 81 (the spiral galaxy below) and M82 (the irregular galaxy on top) in Ursa Major. M81 is Bode’s Galaxy, while M82 is the Cigar Galaxy. The galaxy at bottom left is NGC 3077 This is a stack of 10 x 10-minute exposures with the Canon EOS Ra camera at ISO 800 through the Astro-Physics 130mm apo refractor at f/6 with the 6x7 field flattener lens. Taken April 24/25, 2020. North is up in this view.

Circumpolar star trails over the historic but sadly neglected St. Anthony’s Church between Bow Island and Etzikom, Alberta. The Big Dipper is at left, Polaris at top. The Roman Catholic church was built in 1911 by English, Russian German immigrants. It served a dwindling congregation until 1991 when it closed. At that time workers found a time capsule from 1915 with names of the priest and parisioners of the day. In summer of 2014 the Church suffered its latest indignity when the iron cross on its steeple tower was stolen. It was there when I stopped at this Church on a site scouting trip in M

13898023 - Circumpolar star trails over the historic but sadly neglected St. Anthony’s Church between Bow Island and Etzikom, Alberta. The Big Dipper is at left, Polaris at top. The Roman Catholic church was built in 1911 by English, Russian German immigrants. It served a dwindling congregation until 1991 when it closed. At that time workers found a time capsule from 1915 with names of the priest and parisioners of the day. In summer of 2014 the Church suffered its latest indignity when the iron cross on its steeple tower was stolen. It was there when I stopped at this Church on a site scouting trip in M

Badlands formations in Dinosaur Provincial Park lit by the light from the July 2022 "supermoon" Full Moon off frame at right and behind the hill, on a very clear night. The stars of the northern sky are set in a deep blue sky. Arcturus is at far left; the Big Dipper is at left (distorted somewhat by the panorama projection); Polaris is left of centre at top; Cassiopeia is right of center; Andromeda and Pegasus are below the W of Cassiopeia, and at far right is the star Altair.

13898004 - Badlands formations in Dinosaur Provincial Park lit by the light from the July 2022 "supermoon" Full Moon off frame at right and behind the hill, on a very clear night. The stars of the northern sky are set in a deep blue sky. Arcturus is at far left; the Big Dipper is at left (distorted somewhat by the panorama projection); Polaris is left of centre at top; Cassiopeia is right of center; Andromeda and Pegasus are below the W of Cassiopeia, and at far right is the star Altair.

Israel, in traditional site of her death (the name means Eternal sleep); Jerusalem, commemorating memory of Virgin Mary, Grand German Benedictine abbey located on top of Mount Zion

13889623 - Israel, in traditional site of her death (the name means Eternal sleep); Jerusalem, commemorating memory of Virgin Mary, Grand German Benedictine abbey located on top of Mount Zion

13848303 - Tourist on top of the Pyramid of Kukulkan or the Castillo in the ruins of the Post-Classic Mayan city of Mayapan, Yucatan, Mexico.

Detail of stonework and stairs of Building U at the pre-Columbian Zapotec ruins of Monte Alban in Oaxaca, Mexico. A temple was originally built on top of this platform. A UNESCO World Heritage Site.

13846950 - Detail of stonework and stairs of Building U at the pre-Columbian Zapotec ruins of Monte Alban in Oaxaca, Mexico. A temple was originally built on top of this platform. A UNESCO World Heritage Site.

13845517 - Structure 17 or the Twins in the ruins of the pre-Hispanic Mayan city of Ek Balam in Yucatan, Mexico. The structure has two mirroring temples on the top of the pyramid.

13844761 - View over George Town from Kek Lok Si Temple, Penang, Malaysia. Kek Lok Si Temple is located in the Air Itam area of Penang, an easy bus ride away from the UNESCO World Heritage Site of George Town, where most tourists stay. Being the Largest Buddhist Temple in Southeast Asia, Kek Lok Si Temple is quite a spectacle with stand out features such as the Pagoda of 10,000 Buddhas and thousands upon thousands of prayers attached to chinese lanterns lining the walk to the top, where you are greeted by views back over George Town, Penang. George Town, named after King George II is a city on Penang Isl

13884241 - Wild goat standing on top of a cliff in the Simen Mountains in Northern Ethiopia; Ethiopia

13773594 - Statues In Niches On A Brick Wall With Balustrades Along The Top With Sunlight Streaming Down, Piazza Del Quirinale; Rome, Italy

Hikers standing at the top of the rocky cliffs of the volcano, La Soufriere overlooking the countryside on Basse-Terre; Guadeloupe, French West Indies

13881802 - Hikers standing at the top of the rocky cliffs of the volcano, La Soufriere overlooking the countryside on Basse-Terre; Guadeloupe, French West Indies

13881318 - One lone Adelie penguin stands on top of pack ice in the French Passage off the coast of the Antarctic Peninsula.

13793918 - A Church With A Cross On The Top Of A Spire; Hertfordshire, England

Female hiker looking out over an old stone wall on top of the Galty Mountains in winter in cloudy, foggy weather; County Tipperary, Ireland

13778291 - Female hiker looking out over an old stone wall on top of the Galty Mountains in winter in cloudy, foggy weather; County Tipperary, Ireland

13884531 - A pool of water on top of Auyan Tepui.; Gran Sabana, Venezuela.

13882687 - A rifle on top of a safari vehicle heading into the bright sun.