71452122 - Detailed view of playing cards in hands with visible suit of hearts, Mahajanga, Boeny, Madagascar, Indian Ocean 14090294 - The Boquerón crater with Boqueroncito cinder cone visible at the bottom, San Salvador Volcano or Quetzaltepec, El Salvador. Huge crater of a dorment Vulcan in Central America. Small crater inside named Boqueroncito.14125287 - Zodiacal light before dawn over the Mittens and Merrick Butte in the Monument Valley Navajo Tribal Park in Arizona. Zodiacal light is a result of sunlight reflecting off the interplanetary zodiacal dust cloud and is visible around the spring and autumn soltices.14089707 - The Boquerón crater with Boqueroncito cinder cone visible at the bottom, San Salvador Volcano or Quetzaltepec, El Salvador. Huge crater of a dorment Vulcan in Central America. Small crater inside named Boqueroncito.13999674 - This is the gathering on the evening of April 22,2023 of the waxing crescent Moon below Venus and near the Hyades star cluster in Taurus. The dim Earthshine is visible on the dark side of the Moon. High cloud added the natural glows on the Moon and Venus.13998596 - The infamous "Green" Comet C/2022 E3 (ZTF) passing by reddish Mars with both in the constellation of Taurus on the night of Feb 11,2023. The comet was 2° south of Mars this night. Mars was embedded in some of the dark obscuring dust clouds in Taurus,creating the dark patchy appearance to the background sky. The comet's coma glows cyan due to emission from diatomic carbon molecules,a common trait of comets. The dust tail and faint ion tail are just visible.13998286 - The conjunction of the waxing crescent Moon with Venus (bright and below) and Mars (dim and to the left) on June 21,2023,summer solstice evening,with the worlds in clouds in the colourful twilight sky. Earthshine is just visible on the dark side of the Moon,despite the obscuring clouds.13925278 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 400X. On the right are visible diatoms closed in a special protecting case.\n13900517 - A complex of halo phenomena on the evening of April 15, 2022, Good Friday of the 2022 Easter weekend, around the almost Full Moon. Ice crystals in the high cloud created the halos and arcs, set in the spring night sky, with the Big Dipper at top, Arcturus to the left, and Regulus and Leo at right. The colours of the arcs and sundogs were just visible to the unaided eye.13900448 - A 360° panorama of the winter sky over Dinosaur Provincial Park, Alberta, on February 28, 2017. The Milky Way arches across the sky from south (left) to northeast (right). The Zodiacal Light stretches up from the western horizon at centre. The Gegenschein is faintly visible above the horizon at far left in Leo.13898410 - The partial solar eclipse of October 23, 2014 as seen from Jasper, Alberta, at a public event in Centennial Park as part of the annual Dark Sky Festival. This is a single-exposure image showing the scene near mid-eclipse with telescopes from volunteers from the Royal Astronomical Society of Canada, and the mostly clear skies above with the crescent Sun visible through the handheld polymer solar filter.13897774 - The conjunction of the waning crescent Moon with Venus as they were rising low in the northeast dawn sky on June 26, 2022, taken from home in southern Alberta, latitude 51° N. Earthshine is visible on the dark side of the Moon. The sky exhibits the wonderful transition of colours from the orange at the horizon through the spectrum to the blues at top.13897757 - A horizon-to-zenith panorama of the winter consellations on a March evening as they set into the southwest. Orion is at bottom centre, with his Belt pointing down to Canis Major and up to Taurus. Gemini and Auriga are at top, in this case near the zenith overhead. The bright star clusters, M44, the Beehive, (at left) and M45, the Pleiades, (at right) flank the Milky Way. M45 is embedded in the Zodiacal Light. The star clusters M35 in Gemini and M41 in Canis Major are also visible as diffuse spots, as are several other star clusters. A couple of satellite trails are visible.13897424 - The 5-day-old waxing crescent Moon near the Beehive star cluster, Messier 44, in Cancer on the evening of May 10, 2019, set in the deep blue twilight sky, and with Earthshine still visible on the dark side of the Moon.13846727 - Mount Fitz Roy in Los Glaciares National Park near El Chalten, Argentina. A UNESCO World Heritage Site in the Patagonia region of South America. Because of the prevailing weather patterns over the Southern Patagonian Ice Field, Mount Fitz Roy often makes its own clouds, usually obscuring the peak. It is completely visible only about 5 days per month.13999693 - This is the gathering on the evening of April 22,2023 of the waxing crescent Moon below Venus and near the Hyades star cluster in Taurus,here set amid some silhouetted tree branches. The dim Earthshine is visible on the dark side of the Moon. High cloud added the natural glows on the Moon and Venus.13998879 - Hobie Cat catamaran sailboats sailing in the Caribbean Sea at San Pedro on Ambergris Caye in Belize. The wave break at the Belize Barrier Reef is visible behind.13998721 - Hobie Cat catamaran sailboats sailing in the Caribbean Sea at San Pedro on Ambergris Caye in Belize. The wave break at the Belize Barrier Reef is visible behind.13998448 - A catamaran sailboat on a sailing tour in the Caribbean Sea at San Pedro on Ambergris Caye in Belize. The wave break at the Belize Barrier Reef is visible behind with a dive boat outside the reef.13900455 - The 4-day-old waxing crescent Moon on April 8, 2019 in a single exposure when the Moon was still in the bright blue twilight. Even so, the faint Earthshine is just becoming visible.13900423 - The late winter evening Zodiacal Light, as shot at Dinosaur Provincial Park, Alberta, February 28, 2017. The Light is the glow from sunlight reflecting off cometary dust particles in the inner solar system. It is not an effect of twilight. It is best visible in the evening from northern latitudes in late winter and spring.13899782 - The centre of the Galaxy area in Sagittarius and Scorpius rising in the east, from Australia, on March 30/31, 2014. All of Scorpius is visible as well as Norma, Ara, Lupus and Sagittarius. Scutum is just rising above the gum trees.13899571 - The Full Moon of August 31, 2012 (which was a "Blue Moon" -- i.e. the second Full Moon of the month) rising over a harvested field, with windmills of the Wintering Hill wind farm. The pink Belt of Venus band is visible above the blue band above the horizon that is Earth's shadow. This is a 6-exposure HDR stack taken with the Canon 7D at ISO 100 and 16-35mm lens. Metered exposures.13899040 - A scene at the public "Parks 'n Stars" stargazing night, March 15, 2015, at the City of Rocks State Park, New Mexico, and at their Gene and Elizabeth Simons Observatory in the Orion group campground. Here observers are aiming their laser pointers at the position of Comet Lovejoy in Cassiopeia, just visible at top left. Observers are using the big binoculars to view the comet.13899031 - Orion and the Winter Triangle stars, Sirius, Procyon and Betelgeuse, taken from the Painted Pony Resort in New Mexico, March 13, 2013. A stack of 5 x 8 minute exposures at f/4 with the 35mm Canon lens and 5D MkII at ISO 800, plus a layer of 2 x 8 minutes with the Kenko Softon filter for the star glows. M50, M46, M47 and M41 clusters all visible at left.13898812 - Comet NEOWISE (C/2020 F3) over the still waters this night of Crawling Lake in southern Alberta. This was early in the evening with the sky still brightly coloured with twilight. The comet was in the southern part of Ursa Major between the pairs of stars called Tania and Talitha. The clouds that were present nicely framed the scene and reflected in the water as well. The comet was too high to be visible as a reflection at this time.13898314 - Comet NEOWISE (C/2020 F3) in a telephoto lens close-up on July 19, 2020, showing the straight blue ion tail and the curving whitish-yellow dust tail. Even the ion tail was visible in binoculars and traceable out for 12° or so, or two binocular fields. A bit of cyan colour is visible around the head of the comet. The ninth magnitude galaxy NGC 2841 is visible to the right of the comet.13898150 - The late-night spring Milky Way from my rural backyard in Alberta (latitude 51° N) on a fine May night in 2020, with the waxing Moon just setting and lighting the landscape and sky. Jupiter (brightest) and Saturn to the east (left) are just rising together at left, east of the Milky Way. West of the galactic centre at right is red Antares in Scorpius. The Small Sagittarius and Scutum starclouds are prominent at centre, with their various Messier nebulas and star clusters visible.13897852 - This is the totally eclipsed Moon of November 8, 2022 set in the stars of Aries, with the planet Uranus nearby, visible as the greenish star about three Moon diameters away from the Moon at the 10 o'clock position. Uranus was at oppostion the next night, November 9, at magnitude 5.6.13829454 - A squat lobster Galathea Strigosa sitting on kelp and lit from below creating a silhouette. Green phytoplankton rich water is visible in the background. Loch Leven, Scotland.13829450 - Two beadlet anemones, one a brilliant red colour, in a rockpool with the water line visible and sunset in the background.13778266 - The Stargazer (Uranoscopus chinensis) is an ambush predator that remains buried during the day, with only it's eyes and mouth visible. This species can be found at night, but is nearly impossible to located when the sun is out; Philippines.13999423 - Venus in a close conjunction with dimmer Saturn in the evening twilight on January 22,2023. They were 22 arc minutes apart this evening. The 1-day-old waxing crescent Moon is below the planet pair deep in the twilight. The magnitude 2.8 star Deneb Algiedi,aka Delta Capricorni,is faintly visible below Venus. Venus was magnitude -3.9 while Saturn was magnitude 0.8.13999050 - A panorama of the Milky Way from Scutum (at left) to Serpens (at right),taking in the Scutum Starcloud just left of centre and the Messier 16 and 17 nebulas (the Eagle and Swan respectively) at right. The large faint patch of red above and left of M16 is Sharpless 2-54. The star cluster M25 is at lower right. The M11 and M26 clusters are visible at centre in Scutum.13900496 - An arc of modest aurora borealis (Northern Lights) across the northern horizon, above a prairie meadow in the light of a bright waxing gibbous Moon, a day before Full. This was just after midnight on July 11/12, 2022 when the sky was also still lit by summer twilight colours, and with a weak display of noctilucent clouds also visible low in the northwest at left. The auroral curtains exhibit the usual green band and rays, but also upper altitude reds and purples and a faint blue tint at the very tops where the aurora is lit by the Sun. The aurora was never bright this night (Kp Index was 3 or 13900221 - A subtle and pastel aurora borealis (Northern Lights) in the northeast, above a prairie meadow at "Lone Tree Hill". The foreground and sky are lit by a bright waxing gibbous Moon, a day before Full, shining in the south. This was just after midnight on July 11/12, 2022. The auroral curtains exhibit the usual green band and rays, though with shades of green visible, perhaps from hydrogen-beta proton emission as well as oxygen electron emission, but also upper altitude reds and purples and a faint blue tint at the very tops where the aurora is lit by the Sun. The aurora was never bright this nig13900057 - A close-up of Comet NEOWISE (C/2020 F3) on the night of July 14/15, 2020 with a 135mm telephoto lens, and cropped in somewhat. But the field is about 10° high and the white dust and blue ion tails extend across the frame and beyond it. Some of the banding structure in the dust tail is visible.13898737 - A selfie observing Comet NEOWISE (C/2020 F3) with binoculars on the dark moonless night of July 14/15, 2020 from Dinosaur Provincial Park, Alberta. A faint aurora colours the sky green and magenta. The faint blue ion tail of the comet is visible in addition to its brighter dust tail. The ground is illuminated by starlight and aurora light only.13898370 - A portrait of the infamous STEVE arc of hot flowing gas associated with an active aurora, here showing his distinctive pink colour and the fleeting appearance of the green picket fence fingers that often show up hanging down from the main arc. On this night the green fingers lasted no more than two minutes. STEVE = Strong Thermal Emission Velocity Enhancement, and is a river of hot gas flowing east to west equatorward of the main aurora band. STEVE appeared after the main Kp5-level aurora died down in activity to the north, typical behaviour for STEVE. He was visible for only 35 to 40 minutes,13898359 - Orion, Canis Major & Monoceros, taken from the Painted Pony Resort in New Mexico, March 14, 2013. A stack of 5 x 6 minute exposures at f/3.2 with the 35mm Canon L-series lens and 5D MkII at ISO 800, plus a layer of 2 x 4 minutes with the Kenko Softon filter for the star glows. M46, M47 and M41 clusters all visible at left and lower centre.13897898 - A dim aurora to the north at Grasslands National Park, Saskatchewan, at the Larson Ranch site and its rustic pioneer cabins. Taken August 8, 2016. This is looking northeast to Andromeda (the Andromeda Galaxy is above centre) and Perseus (the Double Cluster is left of centre). This Park is a Dark Sky Preserve. There are no lights visible. Illumination here is from starlight and the setting waxing crescent Moon to the southwest.13810577 - El Capitan under a starry moonlit night (climber's headlamps visible), Yosemite National Park, California, USA13999716 - Venus in a close conjunction with dimmer Saturn in the evening twilight on January 22,2023. They were 22 arc minutes apart this evening. The 1-day-old waxing crescent Moon is below the planet pair deep in the twilight. The magnitude 2.8 star Deneb Algiedi,aka Delta Capricorni,is faintly visible below Venus. Venus was magnitude -3.9 while Saturn was magnitude 0.8.13999613 - This is a composite of the October 14,2023 annular solar eclipse with a sequence of six images showing the Moon advancing across a sunspot,the largest one visible on the Sun that day.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.13998706 - This is a framing of the Scutum Starcloud in the Milky Way,with the bright and rich Wild Duck Cluster,aka Messier 11,embedded in the Starcloud at upper left. The smaller open star cluster M26 is at bottom centre; while the globular cluster NGC 6712 is at lower left,with the small green planetary nebula IC 1295 visible beside it to the left. The area is a study in contrasts between the rich starclouds of the Milky Way and the dark lanes of interstellar dust. The most prominent and densest of those is at upper right,Barnard 103. At top is B110. The general regime of interstellar dust in the regi13900512 - A panorama of the Kp5-level aurora on May 27, 2022, from home, with the aurora displaying prominent magenta rays, created by the red oxygen emission blending with illumination from blue scattered sunlight at high altitudes, common around the summer solstice when the high atmosphere is lit all night long. As a bonus, a dim STEVE arc is forming at far right, to the south of the main auroral oval where STEVE normally appears. STEVE faded, then returned to become more strong and visible across the sky from east to west as the main aurora to the north faded.13899381 - Mars (at top) and Saturn (at left) in Scorpius (or thereabouts - Saturn is technically in Ophiuchus) above Antares and the dark and reflection nebulas around Antares. The globular M4 is visible to the right of Antares.13899378 - The waxing 2-day-old crescent Moon setting over the front range of the Rocky Mountains in southern Alberta, as seen from the Rothney Astrophysical Observatory, April 6, 2019. Earthshine is visible on the night side of the Moon.13899237 - The constellation of Andromeda, with Cassiopeia at upper left, and Pegasus at right, rising over moonlit formations at Dinosaur Provincial Park, Alberta. Illumination is from the waxing gibbous Moon, low in the southwest so it is providing a warm light. The faint (in the moonlit sky) fuzzy patch of the Andromeda Galaxy, Messier 31, is visible at centre.13899191 - A rainbow near sunset from hom in Alberta, May 31, 2014, taken with the 14mm Rokinon ultra wide angle lens. A fainter outer bow is also visible.13898689 - The centre of the Galaxy area in Sagittarius and Scorpius rising in the east, from Australia, on March 30/31, 2014. All of Scorpius is visible as well as Norma, Ara, Lupus and most of Sagittarius.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.13898071 - Mars, Venus and Jupiter (in that order from top to bottom) in a triangle, in conjunction, at an old farmstead near Vulcan, Alberta, in the morning twilight, October 28, 2015. Illumination is from the nearly Full Hunter’s Moon in the west. The trio of planets were in Leo in a fine conjunction not to be repeated until November 21, 2111. Almost all of Leo is visible here, with Regulus, the constellation’s brightest star, just to the right of the windmill blades at top.13897910 - This is Comet NEOWISE (C/2020 F3) over the Horseshoe Canyon formation near Drumheller, Alberta on the night iof July 10-11, 2020, taken about 2 a.m. MDT with the comet just past lower culmination with it circumpolar at this time. Warm light from the rising waning gibbous Moon provides the illumination. The comet’s faint blue ion tail is just barely visible even in the moonlit sky and low altitude. The glow of summer perpetual twilight at latitude 51.5° N still colours the northern horizon despite this being close to the middle of the night.13897728 - Comet NEOWISE (C/2020 F3) over the still waters this night of Crawling Lake in southern Alberta. The Big Dipper is at top. Even in this short exposure, the two tails — dust and ion — are visible. This was July 20, 2020. The blue ion tail is extending up into the Bowl of the Big Dipper, for some 20° in length. Very impressive!13849357 - Mount Fitz Roy in Los Glaciares National Park near El Chalten, Argentina. A UNESCO World Heritage Site in the Patagonia region of South America. Because of the prevailing weather patterns over the Southern Patagonian Ice Field, Mount Fitz Roy often makes its own clouds, usually obscuring the peak. It is completely visible only about 5 days per month.13845633 - Mount Fitz Roy in Los Glaciares National Park near El Chalten, Argentina. A UNESCO World Heritage Site in the Patagonia region of South America. Because of the prevailing weather patterns over the Southern Patagonian Ice Field, Mount Fitz Roy often makes its own clouds, usually obscuring the peak. It is completely visible only about 5 days per month. The village of El Chalten sits at the base of the mountains.13836933 - Cod fish on drying racks in the traditional manner. The town of Svolvaer and coastal mountains are visible between the racks of fish. Svolvaer, Lofoten Islands, Nordland, Norway.13829492 - A common frog - rena temporaria - among frog spawn and reeds. Above and below the water is visible. Glasgow, Scotland13829488 - Rocks and pebbles under the River Coe on a sunny Scottish day. The three sisters mountains, blue skies and a tree are all visible above the water line, Glencoe, Scotland.13829451 - Two beadlet anemones, one a brilliant red colour, in a rockpool with the water line visible and sunset in the background.13812143 - The park road winding through colorful sandstone (hikers visible), Valley of Fire State Park, Nevada, USA.13999660 - The arcs and wisps of the Veil Nebula supernova remnant in Cygnus,framed with the open star cluster NGC 6940 in Vulpecula at lower right. The area is marked by a sharp transition between clear starry sky in the Millky Way and brownish-yellow areas obscured by interstellar dust with fewer stars visible. The nebula colours show up well despite this being a "stock" camera,with no filters employed.13999436 - An ice crystal halo around the waxing gibbous Moon set in the winter stars of a January night. The 22° halo is most obvious and with a reddish and sharper inner rim.,and a bluish and more diffuse outer edge. But a faint inner 8° halo is also visible,a rare halo sometimes called the Van Buijsen Halo (according to Lynch and Livingston in their book Color and Light in Nature; Minnaert also mentions it in his seminal book The Nature of Color and Light in the Open Air). It is not a lens flare as shots taken with the Moon well off to one side of the frame still show the inner halo centred on the Moo13998604 - The conjunction of the waxing 4-day-old crescent Moon below the Pleiades,and set in a slightly hazy sky on March 25,2023. The haze adds the colourful "lunar corona" halo around the bright crescent of the Moon from diffraction effects in the high icy clouds. Shot before the sky got dark,the remaining twilight adds the blue to the background sky. Earthshine is visible on the dark side of the Moon.13924948 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 400X. On the right are visible diatoms closed in a special protecting case.\n13900627 - The iconic Parks Canada red chairs at the waterfowl viewing pond at the entrance of Waterton Lakes National Park, Alberta, Canada, on a moonlit autumn evening with the stars of the autumn sky rising in the northeast. Visible are Perseus, the W of Cassiopeia, and most of Andromeda, including the Andromeda Galaxy at upper right. The bright star at lower left is Capella in Auriga.13899347 - The 6.5-day-old Moon (approximately) with the Lunar X (below centre) and V (above centre) formations well lit on the terminator. This phase has an incredible amount of detail and variety of features visible along the terminator.13898781 - Mars (bottom) and Saturn in conjunction at right, and the Milky Way at left, in deep blue twilight before the sky got filly dark, over the old corral of the 76 Ranch, in Grasslands National Park, Saskatchewan, August 27/28, 2014. Antares and Scorpius are just behind the corral gate at right, Sagittarius is at left in the Milky Way. M6 and M7 open cluster are visible at left.13898763 - Comet NEOWISE (C/2020 F3) reflected in the still waters this night of Crawling Lake in southern Alberta. A dim aurora at right colours the sky magenta. Lingering twilight colours the sky blue. A meteor or more likely a flaring satellite appears at right and is also reflected in the water. Even in this short exposure, the two tails — dust and ion — are visible. This was July 20, 2020.13898305 - A mosaic of the region around the Small Sagittarius Starcloud and Dark Horse dark nebula complex. The field takes in the Milky Way from the Lagoon Nebula at bottom to the Eagle Nebula at top left. In between from top to bottom are the Swan Nebula (M17), and the Small Sagittarius Starcloud (M24). Flanking the bright M24 starcloud are the large open clusters M23 (right) and M25 (left). At bottom left is the M22 globular star cluster. The prominent dark nebula at right is the large Pipe Nebula (B78) with the small Snake Nebula (B72) above it. The whole complex is visible to the naked eye as the D13897449 - Scorpius and Sagittarius rising, with Scorpius coming up on its side, as seen from New South Wales, Australia, April 2, 2016. Mars is the brightest object left of Antares in Scorpius, with fainter Saturn below the reddish pairing of Mars and its rival Antares. The cyan-colored blob at lower left above the trees is Comet Linear/252P, which passed close to Earth the previous month. Many nebulas and clusters are visible along the Milky Way around the Galactic Centre in Sagittarius, which is rising here.13897448 - A mosaic of the region around the centre of the Milky Way in Sagittarius and Scorpius. The field takes in the Milky Way from the Cat's Paw Nebula at bottom edge to the Eagle Nebula at top left. In between from top to bottom are the Swan Nebula (M17), the Small Sagittarius Starcloud (M24), the Trifid and Lagoon Nebulas (M20 and M8) and the open clusters M6 and M7. The prominent dark nebula at right is the large Pipe Nebula (B78) with the small Snake Nebula (B72) above it. The whole complex is visible to the naked eye as the Dark Horse.13848352 - Clouds obscure the Fitz Roy Massif in Los Glaciares National Park near El Chalten, Argentina. A UNESCO World Heritage Site in the Patagonia region of South America. Visible are Loma de las Pizarras and Techado Negro, with half of Cerro Poincenot behind.13845245 - Mount Fitz Roy in Los Glaciares National Park near El Chalten, Argentina. A UNESCO World Heritage Site in the Patagonia region of South America. Because of the prevailing weather patterns over the Southern Patagonian Ice Field, Mount Fitz Roy often makes its own clouds, usually obscuring the peak. It is completely visible only about 5 days per month.13829489 - A common frog - rena temporaria - among frog spawn at night. The moon and tower blocks are visible in the background. Glasgow, Scotland.13999055 - A catamaran sailboat on a sailing tour in the Caribbean Sea at San Pedro on Ambergris Caye in Belize. The wave break at the Belize Barrier Reef is visible behind.13999047 - Comet 2022 E3 (ZTF) at top,as the green fuzzy star above the semi-circle of stars marking the constellation of Corona Borealis,the Northern Crown. The comet was approaching the Sun and Earth at this time (January 3,2023) and was brightening,but even here was visible in binoculars and sporting a short dust tail and cyan-colored coma. ZTF = Zwicky Transient Facility,the telescope used to discover the comet in early 2022.13998299 - The setting Sun descending into a fog bank looking due west,on the evening of the vernal equinox,March 20,2023. The fog dims and reddens the Sun,illustrating atmospheric absorption,and refraction as the solar disk is quite flattened. A couple of sunspots are just visible. The colour gradient is natural and comes from the blend of fog below and clearer twilight sky above.13998285 - An ice crystal halo around the waxing gibbous Moon set in the winter stars of a January night. The 22° halo is most obvious and with a reddish and sharply defined inner rim and a bluish and more diffuse outer edge. But a faint 8° halo is also visible,a rare halo sometimes called the Van Buijsen Halo (according to Lynch and Livingston in their book Color and Light in Nature; Minnaert also mentions it in his seminal book The Nature of Color and Light in the Open Air). It is not a lens flare as shots taken with the Moon well off to one side of the frame still show the inner halo centred on the Mo13900401 - Orion setting in deep twilight sky with stars in abundance but the sky still deep blue, from Australia with Orion “upside down.” The Saucepan asterism popular in Australia is visible here, made of the Belt stars, and stars in the Sword and the star to the left of the bottom star in the Belt here.13899965 - A superb and extensive "grand display" of noctilucent clouds at dawn on July 16, 2022, with the clouds eventually reaching up to the zenith as the sky brightened. Many ripples and wave structures are visible in the clouds.13899663 - The 6.5-day-old Moon (approximately) with the Lunar X (below centre) and V (above centre) formations well lit on the terminator. This phase has an incredible amount of detail and variety of features visible along the terminator.13899446 - A 360° "all-sky" panorama of the northern spring sky, taken when the North Galactic Pole was almost due south high in the sky, so we are looking up out of the plane of our galaxy. The Milky Way is visible but only as an arc low across the north, and on this night (April 27, 2022) an arc of a dim green and magenta aurora nicely coincided with the location of the Milky Way. The North Galactic Pole is located just left of the Coma Berenices star cluster below centre.13899171 - Summer solstice twilight and circumpolar star trails over the badlands of Dinosaur Provincial Park, Alberta. Some bright noctilucent clouds are visible low on the northern horizon. I shot this June 15, 2015 as part of a shoot for a “star trail” video tutorial, as an example image.13898842 - The two-day-old waxing crescent Moon with Earthshine, above Mercury at right, then 4 days past its greatest elongation from the Sun, in the evening sky of May 2, 2022. The star Aldebaran is at left, and below Mercury to the right is the Pleiades, just visible in the twilight and thin clouds.13898005 - Sunset twilight colours and the waxing gibbous Moon over the Chiricahua Mountains in southeast Arizona, south of Willcox. Taken December 15, 2013 on Highway 186. Taken with the 24mm lens and Canon 5D MkII. Some dark crepuscular rays are visible converging to the anti-solar point.13897791 - This is the line-up of planets across the southwestern sky on December 6, 2021, consisting of (L to R): Jupiter, Saturn and Venus, with the 2.5-day-old waxing crescent Moon in conjunction below Venus. The Moon had eclipsed the Sun two days before on December 4, when it was on the ecliptic. Two days later it was below the ecliptic line. Jupiter and Saturn are in Capricornus, with its stars all visible here in the evening twilight. The three planets are nicely equally spaced. Such an array makes the ecliptic line visible.13897703 - A line-up across the southwestern sky on December 5, 2021, consisting of (L to R): Jupiter, Saturn and Venus (brightest), with Jupiter and Saturn in Capricornus, with its stars all visible here though dim in the twilight. The three planets are nicely equally spaced here. Such an array makes the ecliptic line visible.13897598 - A portrait of the infamous STEVE arc of hot flowing gas associated with an active aurora, here showing his distinctive pink colour and the fleeting appearance of the green picket fence fingers that often show up hanging down from the main arc. On this night the green fingers lasted no more than two minutes. STEVE = Strong Thermal Emission Velocity Enhancement, and is a river of hot gas flowing east to west equatorward of the main aurora band. STEVE appeared after the main Kp5-level aurora died down in activity to the north, typical behaviour for STEVE. He was visible for only 35 to 40 minutes,13846187 - The north building of the Nunnery Quadrangle in the pre-Hispanic Mayan ruins of Uxmal, Mexico. The corbel arch doorway of the south building of the Quadrangle is visible in front.13846023 - Clouds obscure the Fitz Roy Massif in Los Glaciares National Park near El Chalten, Argentina. A UNESCO World Heritage Site in the Patagonia region of South America. Visible are Loma de las Pizarras and Techado Negro, with a partial rainbow over the Torre Valley.13829494 - Split shot of the river kinglas with hills in the background. Algae is visible under the water. Scotland.13882300 - Glenfinnan Monument is visible from a hiking route near Glenfinnan, Scotland and Loch Shiel; Glenfinnan, Scotland13881710 - The cityscape and rooftops of Prague are visible from Prague Castle.; Prague, Czech Republic13881590 - The summit of Mount Rainier, visible through low-lying clouds and evergreen trees.; Mount Rainier National Park, Washington13883990 - Blue Ridge Mountain ridgelines are visible at sunset; North Carolina, United States of America13882802 - Seaside mountain with visible sedimentary layers.page suivante
