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13792767 - Stack Of Dates Ready To Sell At Market.

This is a stack of images demonstrating the number of satellites passing through the field of a wide-field telescope over a little more an hour. The field frames the Coma Berenices star cluster. This is from my home at 51° North, a latitude more prone to seeing satellites lit by the Sun well into the evening, if not all night closer to summer solstice. Most trails are north-south so they are likely NOT Starlink satellites but polar orbiting satellites. Interesting that the trails have different colours, likely from their solar panels or other structures reflecting blue and gold tints.

13899519 - This is a stack of images demonstrating the number of satellites passing through the field of a wide-field telescope over a little more an hour. The field frames the Coma Berenices star cluster. This is from my home at 51° North, a latitude more prone to seeing satellites lit by the Sun well into the evening, if not all night closer to summer solstice. Most trails are north-south so they are likely NOT Starlink satellites but polar orbiting satellites. Interesting that the trails have different colours, likely from their solar panels or other structures reflecting blue and gold tints.

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.

13777089 - A stack of pumpkins made to look like a man with stick arms and a carved face, VanDusen Gardens; Vancouver, British Columbia, Canada

70358922 - Teacher sitting at desk with stack of papers to grade, portrait

70262029 - View over wildflowers to South Stack lighthouse, Holyhead, near, Anglesey, UK, Wales

70508476 - Arm reaching around massive stack of paper to write on a single sheet

70463280 - Two young men howl next to a balanced rock stack above a mountain lake in Idaho Sandpoint, Idaho, USA

Stack of two 6 minute exposures at ISO 400 and f/4 with 15mm lens and Canon 5DMkII camera. Taken Sept 10, 2009 with Moon just rising or about to, so sky is brighter than normal.

13898604 - Stack of two 6 minute exposures at ISO 400 and f/4 with 15mm lens and Canon 5DMkII camera. Taken Sept 10, 2009 with Moon just rising or about to, so sky is brighter than normal.

The Carina Nebula, NGC 3572, and surrounding clusters. To the upper left is NGC 3532, the Football Cluster. To the upper right is NGC 3293, the Gem Cluster To the lower left is the nebula complex NGC 3576/81. This is a stack of 5 x 10 minute exposures at f/4.3 with the Borg 77mm astrograph (330mm focal length) and filter-modified Canon 5D MkII at ISO 800. Taken from Coonabarabran, Australia, March 2014.

13898213 - The Carina Nebula, NGC 3572, and surrounding clusters. To the upper left is NGC 3532, the Football Cluster. To the upper right is NGC 3293, the Gem Cluster To the lower left is the nebula complex NGC 3576/81. This is a stack of 5 x 10 minute exposures at f/4.3 with the Borg 77mm astrograph (330mm focal length) and filter-modified Canon 5D MkII at ISO 800. Taken from Coonabarabran, Australia, March 2014.

Sunset colours over White Sands National Monument, New Mexico, December 10, 2013. Venus is at left of centre. This is an HDR (High Dynamic Range) stack of 7 exposures at 2/3 stop increments from -2 to +2 EV, processed first with ACR then with Photomatix Pro. Images taken with the 14mm Rokinon lens at f/4 and Canon 5D MkII at ISO 100. While colour vibrancy has been enhanced the colours to the eye were quite vivid. The HDR technique brings out details in the dark ground while preserving the bright sky.

13897522 - Sunset colours over White Sands National Monument, New Mexico, December 10, 2013. Venus is at left of centre. This is an HDR (High Dynamic Range) stack of 7 exposures at 2/3 stop increments from -2 to +2 EV, processed first with ACR then with Photomatix Pro. Images taken with the 14mm Rokinon lens at f/4 and Canon 5D MkII at ISO 100. While colour vibrancy has been enhanced the colours to the eye were quite vivid. The HDR technique brings out details in the dark ground while preserving the bright sky.

The well-publicized - if not overly publicized! - supermoon (a perigee Full Moon) of November 14, 2016, seen here about 3 degrees above the horizon, rising out of low clouds. The yellow colour is natural, and illuminated the field with a golden glow. However, this is a stack of 4 exposures, from long to short, to create an “HDR” style stack as the longest exposure needed for the clouds blew out the bright Moon. A short exposure was needed for the Moon itself. I took 4 exposures at about 2 stop increments from 1.5 seconds to 1/15 second and blended them not with HDR software but with luminosity

13900260 - The well-publicized - if not overly publicized! - supermoon (a perigee Full Moon) of November 14, 2016, seen here about 3 degrees above the horizon, rising out of low clouds. The yellow colour is natural, and illuminated the field with a golden glow. However, this is a stack of 4 exposures, from long to short, to create an “HDR” style stack as the longest exposure needed for the clouds blew out the bright Moon. A short exposure was needed for the Moon itself. I took 4 exposures at about 2 stop increments from 1.5 seconds to 1/15 second and blended them not with HDR software but with luminosity

The Milky Way from northern Sagittarius to southern Cygnus, above the mountains of Waterton Lakes National Park; Alberta, Aug 31, 2013. This is a stack of 4 x 3 minute exposures at f/2.8 with the 24mm lens and Canon 5D MkII at ISO 1600.

13898058 - The Milky Way from northern Sagittarius to southern Cygnus, above the mountains of Waterton Lakes National Park; Alberta, Aug 31, 2013. This is a stack of 4 x 3 minute exposures at f/2.8 with the 24mm lens and Canon 5D MkII at ISO 1600.

A composite stack of 12 images taken June 11/12, 2017 of the waning gibbous Moon tracking low across the southern sky on a June nght, from moonrise at left at 11:30 pm to when it began to leave the frame at right at 4 a.m. and when the sky was brightening with dawn. Images are at 25-minute intervals. The sky is blue here from the moonlight.

13897834 - A composite stack of 12 images taken June 11/12, 2017 of the waning gibbous Moon tracking low across the southern sky on a June nght, from moonrise at left at 11:30 pm to when it began to leave the frame at right at 4 a.m. and when the sky was brightening with dawn. Images are at 25-minute intervals. The sky is blue here from the moonlight.

The Symons-Noble log cabin from the 1940s in Cypress Hills Interprovincial Park, on the Saskatchewan side, at sunset on July 9, 2014. This is a stack of 6 images for a high dynamic range composite to capture the bright sky and darker foreground in one image. Taken with the Canon 60Da and 10-22mm lens.

13900384 - The Symons-Noble log cabin from the 1940s in Cypress Hills Interprovincial Park, on the Saskatchewan side, at sunset on July 9, 2014. This is a stack of 6 images for a high dynamic range composite to capture the bright sky and darker foreground in one image. Taken with the Canon 60Da and 10-22mm lens.

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.

This is NGC 457, the ET or Owl Cluster in Cassiopeia, in a stack of images showing the total number of satellite trails recorded over the 36 minutes of total expposure time this night. By coincidence, the trails frame the main subject, but the number of satellites now above us make it nearly impossible to take a long exposure image, certainly at the start or end of a night, without recording at least one satellite trail, if not more, per image. Some of the parallel streaks could be Starlink satellites.

13899101 - This is NGC 457, the ET or Owl Cluster in Cassiopeia, in a stack of images showing the total number of satellite trails recorded over the 36 minutes of total expposure time this night. By coincidence, the trails frame the main subject, but the number of satellites now above us make it nearly impossible to take a long exposure image, certainly at the start or end of a night, without recording at least one satellite trail, if not more, per image. Some of the parallel streaks could be Starlink satellites.

The LMC, Large Magellanic Cloud, taken with 135mm telephoto lens for a field of view similar to binoculars. Taken from Timor Cottage, Coonabarabran, NSW, Australia, Dec 5, 2012. This is a stack of 10 x 5 minute exposures, median combined (to eliminate some satellite trails) at f/2.8 with Canon L-series 135mm lens and the modified Canon 5D Mark II camera at ISO 800. Tracked on AP 400 equatorial mount.

13898099 - The LMC, Large Magellanic Cloud, taken with 135mm telephoto lens for a field of view similar to binoculars. Taken from Timor Cottage, Coonabarabran, NSW, Australia, Dec 5, 2012. This is a stack of 10 x 5 minute exposures, median combined (to eliminate some satellite trails) at f/2.8 with Canon L-series 135mm lens and the modified Canon 5D Mark II camera at ISO 800. Tracked on AP 400 equatorial mount.

A composite of the Quadrantid meteor shower, on January 3, 2016, in a sequence of images shot over 2 hours from 9 to 11 pm MST from southern Alberta. This is a stack of 14 images, the best out of 600 shot that recorded meteors. The ground and sky comes from one image with the best Quad of the night, and the other images were masked and layered into that image, with no attempt to align their paths with the moving radiant point. However, over the 2 hours, the radiant point low in the north would not have moved too much, as it rose higher into the northern sky.

13899768 - A composite of the Quadrantid meteor shower, on January 3, 2016, in a sequence of images shot over 2 hours from 9 to 11 pm MST from southern Alberta. This is a stack of 14 images, the best out of 600 shot that recorded meteors. The ground and sky comes from one image with the best Quad of the night, and the other images were masked and layered into that image, with no attempt to align their paths with the moving radiant point. However, over the 2 hours, the radiant point low in the north would not have moved too much, as it rose higher into the northern sky.

Southern Milky Way from Atacama Lodge, Chile (latitude 23° S) taken March 14/15, 2010. Taken witn Canon 5D MkII (modified) and Canon 15mm lens at f/4 for stack of 4 x 6 minute exposures at ISO 800. Horizon retained from just one image to retain detail and minimize blurring from tracking. But sky is Mean stack. Taken before dawn with zodiacal light becoming promiment in east.

13899480 - Southern Milky Way from Atacama Lodge, Chile (latitude 23° S) taken March 14/15, 2010. Taken witn Canon 5D MkII (modified) and Canon 15mm lens at f/4 for stack of 4 x 6 minute exposures at ISO 800. Horizon retained from just one image to retain detail and minimize blurring from tracking. But sky is Mean stack. Taken before dawn with zodiacal light becoming promiment in east.

Gum Nebula area of Vela and Puppis. Taken from Atacama Lodge, Chile, March 19, 2010, with modified Canon 5D MkII and Sigma 50mm lens at f/4, for stack of 10 x 6 minute exposures (Mean combined) at ISO 800 plus 2 x 6 minutes with Kenko Softon filter. High contrast boost and Selective Colour adjustments to bring out nebulocity while retaining neutral sky.

13898921 - Gum Nebula area of Vela and Puppis. Taken from Atacama Lodge, Chile, March 19, 2010, with modified Canon 5D MkII and Sigma 50mm lens at f/4, for stack of 10 x 6 minute exposures (Mean combined) at ISO 800 plus 2 x 6 minutes with Kenko Softon filter. High contrast boost and Selective Colour adjustments to bring out nebulocity while retaining neutral sky.

$A telescopic closeup of Comet Lovejoy (C/2014 Q2) on January 19, 2015. I shot this from near Silver City, New Mexico, using a TMB 92mm apo refractor at f/4.4 and using a Canon 6D at ISO 1600 for a stack of 4 x 5 minute exposures. The ion tail is primarily from a single exposure to minimize blurring from the comet’s motion relative to the stars. The rest of the image is from the stacked combination to minimize noise.$

13898512 - A telescopic closeup of Comet Lovejoy (C/2014 Q2) on January 19, 2015. I shot this from near Silver City, New Mexico, using a TMB 92mm apo refractor at f/4.4 and using a Canon 6D at ISO 1600 for a stack of 4 x 5 minute exposures. The ion tail is primarily from a single exposure to minimize blurring from the comet’s motion relative to the stars. The rest of the image is from the stacked combination to minimize noise.

Sagittarius and Scorpius in diagonal framing, with Milky Way from Ara to Serpens. Taken with 50mm Sigma lens at f/4 and Canon 5D MkII at ISO 800 for stack of just 2 frames each at 6 minutes. Cloud prevented more exposures. Taken from Atacama Lodge, San Pedro de Atacama, Chile.

13898038 - Sagittarius and Scorpius in diagonal framing, with Milky Way from Ara to Serpens. Taken with 50mm Sigma lens at f/4 and Canon 5D MkII at ISO 800 for stack of just 2 frames each at 6 minutes. Cloud prevented more exposures. Taken from Atacama Lodge, San Pedro de Atacama, Chile.

$Comet Hartley 2 near the Pacman Nebula, NGC 281, in Cassiopeia. Stack of 4 x 6 minute exposures at ISO 1600 with Canon 5D MkII on A&M 105mm apo refractor at f/4.8 with Borg reducer/flattener. Bright star is Alpha Cas, Schedar. Autoguided with Celestron NexGuide autoguider. However, image of comet core is from only one exposure to minimize trailing from this fast-moving comet.$

13897417 - Comet Hartley 2 near the Pacman Nebula, NGC 281, in Cassiopeia. Stack of 4 x 6 minute exposures at ISO 1600 with Canon 5D MkII on A&M 105mm apo refractor at f/4.8 with Borg reducer/flattener. Bright star is Alpha Cas, Schedar. Autoguided with Celestron NexGuide autoguider. However, image of comet core is from only one exposure to minimize trailing from this fast-moving comet.

$The North America Nebula (left of centre) and the Pelican Nebula (at centre) complex in Cygnus,framed with the bright star Deneb. The Cygnus Arc of IC 5068 is at bottom. Smaller Sharpless catalogue nebulas are at upper right,notably Sh 2-112. The nebulas show up well despite this being a "stock" camera,with no filters employed. The field of view is about 7.5° by 5°,similar to binoculars. This is a stack of 5 x 5-minute exposures with the Sharpstar 61 EDPH III apo refractor and its 0.75x Reducer for f/4.4,and the old Canon 6D DSLR at ISO 800,all on the ZWO AM5 mount autoguided with the ASIAir,a$

13999717 - The North America Nebula (left of centre) and the Pelican Nebula (at centre) complex in Cygnus,framed with the bright star Deneb. The Cygnus Arc of IC 5068 is at bottom. Smaller Sharpless catalogue nebulas are at upper right,notably Sh 2-112. The nebulas show up well despite this being a "stock" camera,with no filters employed. The field of view is about 7.5° by 5°,similar to binoculars. This is a stack of 5 x 5-minute exposures with the Sharpstar 61 EDPH III apo refractor and its 0.75x Reducer for f/4.4,and the old Canon 6D DSLR at ISO 800,all on the ZWO AM5 mount autoguided with the ASIAir,a

Sunset clouds and colours on December 3, 2013 from Massai Point, Chiricahua National Monument, Arizona. This is a 7-frame HDR High Dynamic Range stack to compress the high contrast from the bright sky and dark foreground into one image. Combined with Photomatix Pro. Taken with the Canon 5D MkIi and Canon 24mm lens at f/8. From images _MG_6996_6997_6998_6999_7000_7001_7002 taken at 2/3rd stop increments.

13900310 - Sunset clouds and colours on December 3, 2013 from Massai Point, Chiricahua National Monument, Arizona. This is a 7-frame HDR High Dynamic Range stack to compress the high contrast from the bright sky and dark foreground into one image. Combined with Photomatix Pro. Taken with the Canon 5D MkIi and Canon 24mm lens at f/8. From images _MG_6996_6997_6998_6999_7000_7001_7002 taken at 2/3rd stop increments.

Circumpolar star trails at dawn over the historic Butala homestead at the Old Man on His Back Prairie and Heritage Conservation Area in southwest Saskatchewan, taken May 2015. This is a stack of 70 frames from a larger time-lapse sequence, from the start of the sequence in the dusk twilight, with some aurora active and adding green and magenta to the sky. Cassiopeia is at left over the house.

13899777 - Circumpolar star trails at dawn over the historic Butala homestead at the Old Man on His Back Prairie and Heritage Conservation Area in southwest Saskatchewan, taken May 2015. This is a stack of 70 frames from a larger time-lapse sequence, from the start of the sequence in the dusk twilight, with some aurora active and adding green and magenta to the sky. Cassiopeia is at left over the house.

A “cloud streak” photo made using the same techniques as in stacking star trails only its the clouds trailing, or streaking. I shot this Canada Day, July 1, 2015 from Scotsman Hill overlooking Calgary, awaiting the fireworks. This is a stack of 110 frames, merged with Advanced Stacker Actions using the Ultrastreaks action. Despite the blending, the ~ 8s gap between exposures still led to gaps in the streaks - you’d have to shoot at 1s intervals to eliminate them. To smooth out the gaps I added a duplicate layer for the sky with a Radial Blur filter applied to further streak the clouds. I also

13899093 - A “cloud streak” photo made using the same techniques as in stacking star trails only its the clouds trailing, or streaking. I shot this Canada Day, July 1, 2015 from Scotsman Hill overlooking Calgary, awaiting the fireworks. This is a stack of 110 frames, merged with Advanced Stacker Actions using the Ultrastreaks action. Despite the blending, the ~ 8s gap between exposures still led to gaps in the streaks - you’d have to shoot at 1s intervals to eliminate them. To smooth out the gaps I added a duplicate layer for the sky with a Radial Blur filter applied to further streak the clouds. I also

13899014 - Circumpolar star trails at dawn over the historic Butala homestead at the Old Man on His Back Prairie and Heritage Conservation Area in southwest Saskatchewan, taken May 2015. This is a stack of 70 frames from a larger time-lapse sequence, from the end of the sequence in the dawn twilight. Each exposure is 40 seconds with the 14mm lens at f/2.8 and Canon 60Da at ISO 1600. Stacked with Advanced Stacker Actions. The foreground comes from a stack of 8 of the final exposures, mean combined, to smooth noise.

An aurora display on the night of June 7/8, 2015 from southern Alberta, with an old rustic farm truck as the foreground. This is a frame from a 450-frame time-lapse with the Nikon D750 at ISO 1600 and the Sigma 24mm lens at f/2.8, for 8 seconds each. The foreground is from a stack of 8 images adjacent in time to the sky image stacked in Mean mode for smoothing of noise.

13898003 - An aurora display on the night of June 7/8, 2015 from southern Alberta, with an old rustic farm truck as the foreground. This is a frame from a 450-frame time-lapse with the Nikon D750 at ISO 1600 and the Sigma 24mm lens at f/2.8, for 8 seconds each. The foreground is from a stack of 8 images adjacent in time to the sky image stacked in Mean mode for smoothing of noise.

A nightscape photographer from one of my workshops, shooting in the moonlight at Red Rock Canyon, in Waterton Lakes National Park, Alberta. Clouds partly obscure the gibbous Moon but add a colourful iridescent corona around the Moon, which is reflected in the Red Rock Canyon Creek. This is an HDR stack of 5 exposures with the 14mm lens and Canon 6D, to preserve detail in the bright clouds and the disk of the Moon, and in the dark shadows.

13897887 - A nightscape photographer from one of my workshops, shooting in the moonlight at Red Rock Canyon, in Waterton Lakes National Park, Alberta. Clouds partly obscure the gibbous Moon but add a colourful iridescent corona around the Moon, which is reflected in the Red Rock Canyon Creek. This is an HDR stack of 5 exposures with the 14mm lens and Canon 6D, to preserve detail in the bright clouds and the disk of the Moon, and in the dark shadows.

The centre of the Galaxy in Sagittarius and Scorpius rising above the southeast horizon, from New Mexico, at the Painted Pony Resort. This is a stack of 5 x 5 minute exposures with the 24mm lens at f/2.8 and Canon 5D MkII at ISO 800. The landscape is from one exposure and shadow detail brought out. An additional image shot thru the Kenko Softon filter was layered in to add the star glows.

13899654 - The centre of the Galaxy in Sagittarius and Scorpius rising above the southeast horizon, from New Mexico, at the Painted Pony Resort. This is a stack of 5 x 5 minute exposures with the 24mm lens at f/2.8 and Canon 5D MkII at ISO 800. The landscape is from one exposure and shadow detail brought out. An additional image shot thru the Kenko Softon filter was layered in to add the star glows.

The Sagittarius Milky Way area, around the centre of the Galaxy, over the trees and campsite at Cypress Hills Interprovincial Park, Sasksatchewan. Taken August 17, 2012 at the Saskatchewan Summer Star Party. This is a composite of 6 exposures: all 2 minutes at f/2.8 and ISO 1600 with the Canon 5D MkII and Sigma 50mm lens, but 5 exposures were tracked and 1 exposure was untracked to prevent the ground from blurring. Ground is from the untracked exposure, sky is from the stack of 5 tracked exposures. All taken from the same location -- the ground is not faked onto a separate sky shot. The horizo

13899586 - The Sagittarius Milky Way area, around the centre of the Galaxy, over the trees and campsite at Cypress Hills Interprovincial Park, Sasksatchewan. Taken August 17, 2012 at the Saskatchewan Summer Star Party. This is a composite of 6 exposures: all 2 minutes at f/2.8 and ISO 1600 with the Canon 5D MkII and Sigma 50mm lens, but 5 exposures were tracked and 1 exposure was untracked to prevent the ground from blurring. Ground is from the untracked exposure, sky is from the stack of 5 tracked exposures. All taken from the same location -- the ground is not faked onto a separate sky shot. The horizo

The region of the Southern Cross, Crux, at left and around the Carina Nebula, at right. To the left of the Southern Cross is the dark Coal Sack. Open star clusters around the Carina Nebula are NGC 3532 (at upper left of nebula), IC 2602, the Southern Pleiades (below the nebula), and NGC 3114 (right of nebula). Taken on a hazy night, so the glows around stars are natural and not introduced from a filter. This is a stack of 5 x 6 minute exposures at f/2.8 with the Sigma 50mm lens and Canon 60Da at ISO 800, on the iOptron SkyTracker. Taken from Coonabarbran, NSW, Australia, March 22, 2014.

13899499 - The region of the Southern Cross, Crux, at left and around the Carina Nebula, at right. To the left of the Southern Cross is the dark Coal Sack. Open star clusters around the Carina Nebula are NGC 3532 (at upper left of nebula), IC 2602, the Southern Pleiades (below the nebula), and NGC 3114 (right of nebula). Taken on a hazy night, so the glows around stars are natural and not introduced from a filter. This is a stack of 5 x 6 minute exposures at f/2.8 with the Sigma 50mm lens and Canon 60Da at ISO 800, on the iOptron SkyTracker. Taken from Coonabarbran, NSW, Australia, March 22, 2014.

$Waxing crescent Moon with Earthshine, April 18, 2010. Taken with 5-inch (130mm) Astro-Physics apo refractor and Canon 7D camera, at f/6 and ISO 100. HDR stack of 9 exposures from 6 seconds to 1/40th second at 1-stop intervals. Combined in Photomatix Pro.$

13899313 - Waxing crescent Moon with Earthshine, April 18, 2010. Taken with 5-inch (130mm) Astro-Physics apo refractor and Canon 7D camera, at f/6 and ISO 100. HDR stack of 9 exposures from 6 seconds to 1/40th second at 1-stop intervals. Combined in Photomatix Pro.

$Comet Holmes, 17P, taken Nov 1, 2007 on excellent night. Taken with A&M 105mm apo refractor at f/5 with Borg 0.85x compressor/field flattener on SkyWatcher HEQ5 mount. Canon 20Da camera at ISO400. Composite of 4 min, 2min, 1min, 30sec, 15sec, and 7 sec exposures, each exposure being a stack of 3 to 4 identical exposures. Registered and stacked in Photoshop (HDR mode did not produce usable result, so manually composited with sucessively smaller masks to reveal short exposure content around nucleus. Contrast exaggerated with Curves to bring out very faint tail structure. North up, so tail to the$

13898997 - Comet Holmes, 17P, taken Nov 1, 2007 on excellent night. Taken with A&M 105mm apo refractor at f/5 with Borg 0.85x compressor/field flattener on SkyWatcher HEQ5 mount. Canon 20Da camera at ISO400. Composite of 4 min, 2min, 1min, 30sec, 15sec, and 7 sec exposures, each exposure being a stack of 3 to 4 identical exposures. Registered and stacked in Photoshop (HDR mode did not produce usable result, so manually composited with sucessively smaller masks to reveal short exposure content around nucleus. Contrast exaggerated with Curves to bring out very faint tail structure. North up, so tail to the

Evening twilight with Venus in the sky, on December 3, 2013 from Massai Point, Chiricahua National Monument, Arizona. This is a 8-frame HDR High Dynamic Range stack to compress the high contrast from the bright sky and dark foreground into one image. Combined with Photomatix Pro. Taken with the Canon 5D MkIi and Rokinon 14mm manual lens at f/8. Some wind has blurred trees. From images _MG_7042 to 7049, taken at 2/3rd stop increments.

13898845 - Evening twilight with Venus in the sky, on December 3, 2013 from Massai Point, Chiricahua National Monument, Arizona. This is a 8-frame HDR High Dynamic Range stack to compress the high contrast from the bright sky and dark foreground into one image. Combined with Photomatix Pro. Taken with the Canon 5D MkIi and Rokinon 14mm manual lens at f/8. Some wind has blurred trees. From images _MG_7042 to 7049, taken at 2/3rd stop increments.

The quarter Moon reflected in the waters of Reesor Lake, Alberta in Cypress Hills Interprovincial Park. Taken on July 5, 2014. This is with the 14mm Rokinon lens and Canon 6D at ISO800. This is a high dynamic range stack of 6 exposures from 1/15 to 0.6 seconds taken just before using the camera to take a motion control time-lapse. The Moon was in conjunction with Mars (right of Moon) and Spica (left of Moon) but in the bright twilight they are not showing up here.

13898528 - The quarter Moon reflected in the waters of Reesor Lake, Alberta in Cypress Hills Interprovincial Park. Taken on July 5, 2014. This is with the 14mm Rokinon lens and Canon 6D at ISO800. This is a high dynamic range stack of 6 exposures from 1/15 to 0.6 seconds taken just before using the camera to take a motion control time-lapse. The Moon was in conjunction with Mars (right of Moon) and Spica (left of Moon) but in the bright twilight they are not showing up here.

71388029 - Road to South Stack Lighthouse, Anglesey, Wales, United Kingdom. Light. rock island.

71387648 - View along cliffs to Witches Finger, sea stack. Vagar, Faeroer. dark rain clouds.

71387647 - View along cliffs to Witches Finger, sea stack. Vagar, Faeroer. dark rain clouds.

70501033 - A surfer runs to the waves next to a stack of boards at Los Cerritos near Pescadero, Mexico.

Close up, Close-up, Closeup, Color, Colour, Concept, Concepts, Cup, Cups, Detail, Details, Empty, Handle, Handles, Heap, Heaped, Indoor, Indoors, Inside, Interior, Object, Objects, Pile, Piled up, Piles, Saucer, Saucers, Selective focus, Stack, Stacked,

70105708 - Close up, Close-up, Closeup, Color, Colour, Concept, Concepts, Cup, Cups, Detail, Details, Empty, Handle, Handles, Heap, Heaped, Indoor, Indoors, Inside, Interior, Object, Objects, Pile, Piled up, Piles, Saucer, Saucers, Selective focus, Stack, Stacked,

70241016 - Stack of stones

70233374 - A stack of barrels on a flat bed truck in New Mexico

Central America, Color, Colour, Daytime, Exterior, Green, Heap, Heaped, Heaps, Latin America, Leaf, Leaves, Mexico, Nature, North America, Outdoor, Outdoors, Outside, Palm, Palms, Pile, Piled up, Piles, Plant, Plants, Stack, Stacked, Stacks, Vegetation, V

70186327 - Central America, Color, Colour, Daytime, Exterior, Green, Heap, Heaped, Heaps, Latin America, Leaf, Leaves, Mexico, Nature, North America, Outdoor, Outdoors, Outside, Palm, Palms, Pile, Piled up, Piles, Plant, Plants, Stack, Stacked, Stacks, Vegetation, V

71052273 - Stack of prayer stones on Isla del Sol (Island of the Sun), Lake Titicaca, Bolivia, South America

Avarice, Avaricious, Cash, Close up, Close-up, Closeup, Coin, Coins, Color, Colour, Concept, Concepts, Earning, Earnings, Economy, Golden, Heap, Heaped, Heaps, Indoor, Indoors, Inside, Interior, Many, Money, Pile, Piled up, Piles, Profit, Profits, Stack,

70105704 - Avarice, Avaricious, Cash, Close up, Close-up, Closeup, Coin, Coins, Color, Colour, Concept, Concepts, Earning, Earnings, Economy, Golden, Heap, Heaped, Heaps, Indoor, Indoors, Inside, Interior, Many, Money, Pile, Piled up, Piles, Profit, Profits, Stack,

Motorboats and fishing boats moored to the dock, piled with fishing nets in the harbor in Sainte Rose on Basse-Terre; Guadeloupe, French West Indies

13881811 - Motorboats and fishing boats moored to the dock, piled with fishing nets in the harbor in Sainte Rose on Basse-Terre; Guadeloupe, French West Indies

13881812 - Motorboats and fishing boats moored to the dock, piled with fishing nets in the harbor in Sainte Rose on Basse-Terre; Guadeloupe, French West Indies

10284047 - Stack of crates at Alexandria Fish Market , Alexandria, Egypt

Accessibility, Bollard, Bollards, Cities, City, Color, Colour, Concept, Concepts, Cone, Cones, Corner, Corners, Daytime, Exterior, Fire escape, Heap, Heaped, Obstacle, Obstacles, Out of place, Outdoor, Outdoors, Outside, Pile, Piled up, Piles, Stack, Sta

70105814 - Accessibility, Bollard, Bollards, Cities, City, Color, Colour, Concept, Concepts, Cone, Cones, Corner, Corners, Daytime, Exterior, Fire escape, Heap, Heaped, Obstacle, Obstacles, Out of place, Outdoor, Outdoors, Outside, Pile, Piled up, Piles, Stack, Sta

71061497 - steres of wood for fireplaces and wood-burning stoves, samoens, next to a chalet home, haute savoie (74), france

71050832 - Yad Vashem Holocaust Memorial, Monument to the Jewish soldiers who fought Nazi Germany, Mount Herzl, Jerusalem, Israel, Middle East

70346624 - Peat turf near Glencolumbkille, Donegal, Ireland Cut and stacked to dry in the summer provides fuel for winter hearths

71052272 - Stack of prayer stones on Isla del Sol (Island of the Sun), Lake Titicaca, Bolivia, South America

70345865 - Stock photo of pebbles balanced one on top of the other to make a pebble tower

A blend of images to show the stars of the southern sky moving from east to west (left to right) over the peaks of the Continental Divide at Herbert Lake near Lake Louise, in Banff, Alberta. The main peak at left is Mount Temple.

13899127 - A blend of images to show the stars of the southern sky moving from east to west (left to right) over the peaks of the Continental Divide at Herbert Lake near Lake Louise, in Banff, Alberta. The main peak at left is Mount Temple.

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.

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.

Old pilings in Resurrection Bay, gateway to the Kenai Fjords in Kenai Fjords National Park, Alaska, United States of America, North America

13708635 - Old pilings in Resurrection Bay, gateway to the Kenai Fjords in Kenai Fjords National Park, Alaska, United States of America, North America

The Geminid meteor shower of 2022, showing the radiant point in Gemini at left, above the stars Castor and Pollux. Orion is at lower right. Mars in Taurus is at top, to the left of Aldebaran and the Hyades star cluste, and below the Pleiades.

13899495 - The Geminid meteor shower of 2022, showing the radiant point in Gemini at left, above the stars Castor and Pollux. Orion is at lower right. Mars in Taurus is at top, to the left of Aldebaran and the Hyades star cluste, and below the Pleiades.

This is the rich nebulosity in Cygnus captured in colour but with a blend of unfiltered and filtered images for an Ha-RGB mix to bring out the faint nebulosity.

13899927 - This is the rich nebulosity in Cygnus captured in colour but with a blend of unfiltered and filtered images for an Ha-RGB mix to bring out the faint nebulosity.

Comet Leonard (C/2021 A1) on the morning of December 10, 2021, with a 135mm telephoto lens for a field of view of 10° x 15°. The tail appears to be about 4° long here. Taken about 5:45 am MST. The distinctive cyan tint of a comet's coma is prominent. The comet was in Serpens at the time.

13898154 - Comet Leonard (C/2021 A1) on the morning of December 10, 2021, with a 135mm telephoto lens for a field of view of 10° x 15°. The tail appears to be about 4° long here. Taken about 5:45 am MST. The distinctive cyan tint of a comet's coma is prominent. The comet was in Serpens at the time.

The galactic centre area of the Milky Way in Sagittarius behind the grand old barn near home in southern Alberta, on June 30, 2019. Illumination of the barn is from twilight to the north, but also from light pollution skyglow from the west off frame at right. The sky is blue from the perpetual summer twilight at this time of year.

13897676 - The galactic centre area of the Milky Way in Sagittarius behind the grand old barn near home in southern Alberta, on June 30, 2019. Illumination of the barn is from twilight to the north, but also from light pollution skyglow from the west off frame at right. The sky is blue from the perpetual summer twilight at this time of year.

A composite showing the 2017 Geminid meteors streaking from the radiant point in Gemini at upper left, above the blue-white star Castor. 2 or 3 meteors are not Geminids as their paths do not project back to the radiant, but I have left them in regardless, as an illustration.

13900411 - A composite showing the 2017 Geminid meteors streaking from the radiant point in Gemini at upper left, above the blue-white star Castor. 2 or 3 meteors are not Geminids as their paths do not project back to the radiant, but I have left them in regardless, as an illustration.

13847304 - A man uses his phone to photograph a soil sample, Debre Berhan, Ethiopia

The Geminid meteor shower of 2022, showing the radiant point in Gemini at left, above Castor and Pollux. Orion is at lower right. Mars in Taurus is at top, to the left of Aldebaran and the Hyades star cluster. The M44 Beehive star cluster is in the lower left corner. Small star clusters in Gemini (M35) and Auriga (M36, M37, M38) are at top.

13898560 - The Geminid meteor shower of 2022, showing the radiant point in Gemini at left, above Castor and Pollux. Orion is at lower right. Mars in Taurus is at top, to the left of Aldebaran and the Hyades star cluster. The M44 Beehive star cluster is in the lower left corner. Small star clusters in Gemini (M35) and Auriga (M36, M37, M38) are at top.

Mount Cephren at Lower Waterfowl Lake, in the light of the low waning Moon lighting the peaks but not the foreground. This is from the lakeside viewpoint on the Icefields Parkway in Banff National Park, Alberta. I shot this on a very clear night October 13, 2022. There was enough wind to ripple the water and blur any stellar reflections. The Milky Way is to the left of Cephren, but is being lost in the brightening moonlit sky.

13898858 - Mount Cephren at Lower Waterfowl Lake, in the light of the low waning Moon lighting the peaks but not the foreground. This is from the lakeside viewpoint on the Icefields Parkway in Banff National Park, Alberta. I shot this on a very clear night October 13, 2022. There was enough wind to ripple the water and blur any stellar reflections. The Milky Way is to the left of Cephren, but is being lost in the brightening moonlit sky.

A trio of Perseid meteors streaking from left to right away from the radiant point in Perseus off frame at left,and down the summer Milky Way in Cygnus and Lyra. The meteors display the characteristic transition from green to red along their ionization path. The framing includes the Summer Triangle stars,Deneb,Vega and Altair.

13998612 - A trio of Perseid meteors streaking from left to right away from the radiant point in Perseus off frame at left,and down the summer Milky Way in Cygnus and Lyra. The meteors display the characteristic transition from green to red along their ionization path. The framing includes the Summer Triangle stars,Deneb,Vega and Altair.

Gateway to Transylvania with a hazy blue hue over the Carpathian Mountains near Tasuleasa Social NGO for the Via Transilvanica trail through Transylvania, with conifers lining a grass meadow and the traditional Romanian haystacks corralled in the open fields on a sunny day; Transylvania, Romania

13881894 - Gateway to Transylvania with a hazy blue hue over the Carpathian Mountains near Tasuleasa Social NGO for the Via Transilvanica trail through Transylvania, with conifers lining a grass meadow and the traditional Romanian haystacks corralled in the open fields on a sunny day; Transylvania, Romania

71381329 - Japan, Tokyo, Fire burning in furnace next to pair of boots and wooden shipping crates inside Tsukiji fish market

MAURITIUS, Tamarin, women carry heavy loads of salt to a storage facility where it is stored and prepared for transportation, Tamarin Salt Pans

70434621 - MAURITIUS, Tamarin, women carry heavy loads of salt to a storage facility where it is stored and prepared for transportation, Tamarin Salt Pans

70452665 - Looking past clothes for sale in narrow passageway to man walking up alley, Fez, Morocco

70435032 - SWITZERLAND, Couvet, stacked bottles of Absinthe are ready to be labeled, Artemisia Distillerie, Jura Region

70434620 - MAURITIUS, Tamarin, a storage room filled with piles of salt that is ready to be transported, Tamarin Salt Pans

70488451 - 'Winter weather comes to the Oregon coast; Cannon Beach, Oregon, United States of America'

70486019 - Rocks Balancing In A Pile From Largest To Smallest On A Boulder Along The Water's Edge South Shields Tyne And Wear England

70472747 - Antibiotic drugs being tested to see how resistant they are to bacteria

Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Portrait of Clergymen during Meskel celebra

70396053 - Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Portrait of Clergymen during Meskel celebra

70357684 - Pile of Wood, the Right to Take Wood From the Forests, Forest in the Bay of Somme, Somme (80), France

Migrating Monarch butterflies Danaus plexippus on milkweed in Pacific Grove, California The monarchs migrate from the Canadian rockies through California to Mexico Their Mexican habitat of fir forests is being destroyed by illegal logging Class: Insect

70315468 - Migrating Monarch butterflies Danaus plexippus on milkweed in Pacific Grove, California The monarchs migrate from the Canadian rockies through California to Mexico Their Mexican habitat of fir forests is being destroyed by illegal logging Class: Insect

Wai'anapanapa State Park. A leafy location with sea caves and volcanic cliffs. Hana Highway. Maui. Hawaii. This is a great stop in the Road to Hana. Beautiful vistas, black sand beaches, hiking and ample parking. The turn off can be easily missed so make

71113295 - Wai'anapanapa State Park. A leafy location with sea caves and volcanic cliffs. Hana Highway. Maui. Hawaii. This is a great stop in the Road to Hana. Beautiful vistas, black sand beaches, hiking and ample parking. The turn off can be easily missed so make

70645361 - Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Portrait of Clergymen during Meskel celebra

70396058 - Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Traditional colorful sunshades of the clerg

70719107 - Earthenware pots to cook the tagine, Morocco

70594067 - Fishing boat tied up to a dock on Elbow Lake Wanup Ontario

70396056 - Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Portrait of Clergymen during Meskel celebra

70396054 - Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Portrait of Clergymen during Meskel celebra

70396059 - Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Crown Meskel is one of the important relig

70396057 - Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Traditional colorful sunshades of the clerg

Yak fibre weaver, Poga Sumdo litte village inhabited by Tibetan refugees on the way to Lake Moriri area, Rupshu Valley, Ladakh, Jammu and Kashmir, India

70354549 - Yak fibre weaver, Poga Sumdo litte village inhabited by Tibetan refugees on the way to Lake Moriri area, Rupshu Valley, Ladakh, Jammu and Kashmir, India

70472746 - Antibiotic drugs being tested to see how resistant they are to bacteria

70270361 - Mountain of coal pours out of mountain on a conveyor belt to be trucked to the port, Svea coal mine, Svalbard, Norway

70472745 - Antibiotic drugs being tested to see how resistant they are to bacteria

70396055 - Meskel Cerimony in Lalibela Meskal, Meskal, Maskal, Mescel, Mesquel, which is taking place every September For Meskel many pilgrims are coming to lalibela, to celebrate it at one of the holy palces in Ethiopia Portrait of Clergymen during Meskel celebra

70346693 - Peat turf stacked to dry for fuel below mist covered Slievemore mountain on Achill Island, County Mayo, west Ireland

71081520 - A hiker uses a tablet to take a picture of his friend standing next to the summit cairn of Sauk Mountain, Washington.

71081523 - A man uses his smartphone to take a selfie at sunset from the summit of Sauk Mountain, Washington.

71081524 - A man uses his smartphone to take a selfie from the summit of a mountain in Washington.