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Not that people arguing in bad faith care but learning how to detect logical fallacies is very, very important.

And honestly it's kind of fun to look for them when a jerk tries to use them against you.

https://yourlogicalfallacyis.com/

#science #argument #media #speech #knowledge #education


A Luminous Night
* Image Credit & Copyright: Phil Hart

Explanation:
What shines in the world at night? Just visible to the eye, a rare electric blue glow spread along the shores of Victoria Lake on January 16, 2013. Against reflections of a light near the horizon, this digitally stacked long exposure recorded the bioluminescence of Noctiluca scintillans, plankton stimulated by the lapping waves. Above, the night skies of the Gippsland Lakes region, Victoria, Australia shine with a fainter greenish airglow. Oxygen atoms in the upper atmosphere, initially excited by ultraviolet sunlight, produce the more widely seen fading atmospheric chemiluminescence. Washed out by the Earth's rotation, the faint band of the southern summer Milky Way stretches from the horizon as star trails circle the South Celestial Pole.

https://apod.nasa.gov/apod/ap140809.html

#space #earth #astrophotography #photography #astroart #art #science #education

2014 August 9

A Luminous Night
 * Image Credit & Copyright: Phil Hart

Explanation: 
What shines in the world at night? Just visible to the eye, a rare electric blue glow spread along the shores of Victoria Lake on January 16, 2013. Against reflections of a light near the horizon, this digitally stacked long exposure recorded the bioluminescence of Noctiluca scintillans, plankton stimulated by the lapping waves. Above, the night skies of the Gippsland Lakes region, Victoria, Australia shine with a fainter greenish airglow. Oxygen atoms in the upper atmosphere, initially excited by ultraviolet sunlight, produce the more widely seen fading atmospheric chemiluminescence. Washed out by the Earth's rotation, the faint band of the southern summer Milky Way stretches from the horizon as star trails circle the South Celestial Pole. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


2019 March 21

Star Trails and the Equinox Sunrise
 * Image Credit & Copyright: Juan Carlos Casado (TWAN, Earth and Stars)
Acknowledgement: Andrea Rodriguez Anton

Explanation: 
Stars trail and the Sun rises in this night and day composite panorama made on March 19. The view looks toward the eastern horizon from La Nava de Santiago, Spain. To create it, a continuous series of digital frames was recorded for about two hours and combined to trace the concentric motion of the stars through the night sky. A reflection of the Earth's rotation, star trails curve around the north celestial pole toward upper left and the south celestial pole toward the lower right. Of course on that day the Sun was near the celestial equator, a diagonal straight line in the wide-angle projection. A dense dimming filter was used to capture the Sun's image every two minutes. Superimposed on the star trails it rose due east in the morning sky. In the scene, foreground landscape and a local prehistoric monument were illuminated by full moonlight, though. The monument's corridor faces nearly to the east and the equinox sunrise. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


Cosmos in Reflection
* Image Credit & Copyright: Jeff Dai (TWAN)
https://twanight.org/profile/jeff-dai/

Explanation:
During the day, over 12,000 large mirrors reflect sunlight at the 100-megawatt, molten-salt, solar thermal power plant at the western edge of the Gobi desert near Dunhuang, Gansu Province, China. Individual mirror panels turn to track the sun like sunflowers. They conspire to act as a single super mirror reflecting the sunlight toward a fixed position, the power station's central tower. During the night the mirrors stand motionless though. They reflect the light of the countless distant stars, clusters and nebulae of the Milky Way and beyond. This sci-fi night skyscape was created with a camera fixed to a tripod near the edge of the giant mirror matrix on September 15. The camera's combined sequence of digital exposures captures concentric arcs of celestial star trails through the night with star trails in surreal mirrored reflection.

https://apod.nasa.gov/apod/ap230922.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2023 September 22

Cosmos in Reflection
 * Image Credit & Copyright: Jeff Dai (TWAN)

Explanation: 
During the day, over 12,000 large mirrors reflect sunlight at the 100-megawatt, molten-salt, solar thermal power plant at the western edge of the Gobi desert near Dunhuang, Gansu Province, China. Individual mirror panels turn to track the sun like sunflowers. They conspire to act as a single super mirror reflecting the sunlight toward a fixed position, the power station's central tower. During the night the mirrors stand motionless though. They reflect the light of the countless distant stars, clusters and nebulae of the Milky Way and beyond. This sci-fi night skyscape was created with a camera fixed to a tripod near the edge of the giant mirror matrix on September 15. The camera's combined sequence of digital exposures captures concentric arcs of celestial star trails through the night with star trails in surreal mirrored reflection. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


11 Hour Star Trails
* Credit & Copyright: Josch Hambsch

Explanation:
Fix your camera to a tripod, lock the shutter open, and you can make an image of star trails - graceful concentric arcs traced by the stars as planet Earth rotates on its axis. Of course, the length of the star trails will depend on the exposure time. While exposures lasting just five minutes produce a significant arc, in about 12 hours a given star would trace out half a circle. But in any long exposure, the background glow from light-polluted skies can build up to wash out the trails. Still, astronomer Josch Hambsch produced this stunning composite of star trails around the South Celestial Pole with an effective "all night" exposure time of almost 11 hours. To do it, he combined 128 consecutive five minute long digital exposures recorded in very dark night skies above Namibia. In his final image, the background glow on the right is due in part to the faint, arcing Milky Way.

https://apod.nasa.gov/apod/ap060915.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2006 September 15

11 Hour Star Trails
Credit & Copyright: Josch Hambsch

Explanation: 
Fix your camera to a tripod, lock the shutter open, and you can make an image of star trails - graceful concentric arcs traced by the stars as planet Earth rotates on its axis. Of course, the length of the star trails will depend on the exposure time. While exposures lasting just five minutes produce a significant arc, in about 12 hours a given star would trace out half a circle. But in any long exposure, the background glow from light-polluted skies can build up to wash out the trails. Still, astronomer Josch Hambsch produced this stunning composite of star trails around the South Celestial Pole with an effective "all night" exposure time of almost 11 hours. To do it, he combined 128 consecutive five minute long digital exposures recorded in very dark night skies above Namibia. In his final image, the background glow on the right is due in part to the faint, arcing Milky Way. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


Annapurna Star Trails
* Credit & Copyright: Wang Jinglei, Jia Hao

Explanation: In myth, Atlas holds up the heavens. But in this moonlit mountainscape, peaks of the Himalayan Annapurna Range appear to prop up the sky as seen from Ghandruk, Nepal. From left to right the three main peaks are Annapurna South (7,219 meters), Hiunchuli (6,441 meters), and Machapuchare (6,995 meters). Of course the mountains are moving not the stars, the Earth's rotation about its axis causing the concentric star trails recorded in the time exposure. Positioned above Annapurna South, the North Celestial Pole is easily identified as the point at the center of all the star trail arcs. The star Polaris, also known as the North Star, made the very short and bright arc closest to the North Celestial Pole.

https://apod.nasa.gov/apod/ap091128.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2009 November 28

Annapurna Star Trails
 * Credit & Copyright: Wang Jinglei, Jia Hao

Explanation: In myth, Atlas holds up the heavens. But in this moonlit mountainscape, peaks of the Himalayan Annapurna Range appear to prop up the sky as seen from Ghandruk, Nepal. From left to right the three main peaks are Annapurna South (7,219 meters), Hiunchuli (6,441 meters), and Machapuchare (6,995 meters). Of course the mountains are moving not the stars, the Earth's rotation about its axis causing the concentric star trails recorded in the time exposure. Positioned above Annapurna South, the North Celestial Pole is easily identified as the point at the center of all the star trail arcs. The star Polaris, also known as the North Star, made the very short and bright arc closest to the North Celestial Pole. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


Warped Sky: Star Trails Panorama
* Credit & Copyright: Peter Ward

Explanation:
What's happened to the sky? A time warp, of sorts, and a digital space warp too. The time warp occurs because this image captured in a single frame a four hour exposure of the night sky. As a result, prominent star trails are visible. The space warp occurs because the picture is actually a full 360 degree panorama, horizontally compressed to fit your browser. As the Earth rotated, stars appeared to circle both the South Celestial Pole, on the left, and the North Celestial Pole, just below the horizon on the right. The image captured the sky over Mudgee, New South Wales, Australia, including the domes of two large telescopes illuminated by red lighting. A horizontally unwarped image is visible by clicking on the image.

https://apod.nasa.gov/apod/ap100711.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2010 July 11

Warped Sky: Star Trails Panorama
 * Credit & Copyright: Peter Ward

Explanation: 
What's happened to the sky? A time warp, of sorts, and a digital space warp too. The time warp occurs because this image captured in a single frame a four hour exposure of the night sky. As a result, prominent star trails are visible. The space warp occurs because the picture is actually a full 360 degree panorama, horizontally compressed to fit your browser. As the Earth rotated, stars appeared to circle both the South Celestial Pole, on the left, and the North Celestial Pole, just below the horizon on the right. The image captured the sky over Mudgee, New South Wales, Australia, including the domes of two large telescopes illuminated by red lighting. A horizontally unwarped image is visible by clicking on the image. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


2012 August 2

South Pole Star Trails
 * Image Credit & Copyright: Robert Schwarz (South Pole Station)

Explanation: 
No star dips below the horizon and the Sun never climbs above it in this remarkable image of 24 hour long star trails. Showing all the trails as complete circles, such an image could be achieved only from two places on planet Earth. This example was recorded during the course of May 1, 2012, the digital camera in a heated box on the roof of MAPO, the Martin A. Pomerantz Observatory at the South Pole. Directly overhead in the faint constellation Octans is the projection of Earth's rotational axis, the South Celestial Pole, at the center of all the star trail circles. Not so well placed as Polaris and the North Celestial Pole, the star leaving the small but still relatively bright circle around the South Celestial Pole is Beta Hydri. The inverted umbrella structure on the horizon at the right of the allsky field of view is the ground shield for the SPUD telescope. A shimmering apparition of the aurora australis also visited on this 24 hour night. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


Star Trails above Table Mountain
* Image Credit & Copyright: Eric Nathan

Explanation:
Stars trail above and urban lights sprawl below in this moonlit nightscape from Cape Town, South Africa, planet Earth. The looming form of Table Mountain almost seems to hold terrestrial lights at bay while the stars circle the planet's South Celestial Pole. This modern perspective on the natural night sky was captured in June 2014, the scene composed of over nine hundred, stacked 30 second exposures. The stunning result was chosen as the winner in the Against the Lights category, a selection from over 800 entries in The World at Night's 2015 International Earth and Sky Photo Contest.

https://apod.nasa.gov/apod/ap150625.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2015 June 25

Star Trails above Table Mountain
 * Image Credit & Copyright: Eric Nathan

Explanation: 
Stars trail above and urban lights sprawl below in this moonlit nightscape from Cape Town, South Africa, planet Earth. The looming form of Table Mountain almost seems to hold terrestrial lights at bay while the stars circle the planet's South Celestial Pole. This modern perspective on the natural night sky was captured in June 2014, the scene composed of over nine hundred, stacked 30 second exposures. The stunning result was chosen as the winner in the Against the Lights category, a selection from over 800 entries in The World at Night's 2015 International Earth and Sky Photo Contest. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


Star Trails at Dawn
* Credit & Copyright: Koen van Gorp

Explanation:
Just fix your camera to a tripod and you too can make an image of graceful trails traced by the stars as planet Earth rotates on its axis. Made on September 14 from Montlaux, France, this wide-angle view nicely shows the stars near the celestial equator tracing nearly straight lines in projection, while stars north and south of the equator, respectively, appear to circle the north and south celestial poles. Featured are the stars of Orion (right of center), brilliant Venus rising (left) as bright star Sirius rises in the south (bottom center), and a polar orbiting Iridium satellite (upper left). Beautiful dawn sky colors seem painted along the horizon. This remarkable picture was constructed from 477 consecutive 30 second digital exposures recorded over 4.3 hours and later combined

https://apod.nasa.gov/apod/ap071208.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2007 December 8

Star Trails at Dawn
 * Credit & Copyright: Koen van Gorp

Explanation: 
Just fix your camera to a tripod and you too can make an image of graceful trails traced by the stars as planet Earth rotates on its axis. Made on September 14 from Montlaux, France, this wide-angle view nicely shows the stars near the celestial equator tracing nearly straight lines in projection, while stars north and south of the equator, respectively, appear to circle the north and south celestial poles. Featured are the stars of Orion (right of center), brilliant Venus rising (left) as bright star Sirius rises in the south (bottom center), and a polar orbiting Iridium satellite (upper left). Beautiful dawn sky colors seem painted along the horizon. This remarkable picture was constructed from 477 consecutive 30 second digital exposures recorded over 4.3 hours and later combined. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


2009 March 14

Haute-Provence Star Trails
 * Credit & Copyright: Alexandre Santerne / OHP-CNRS

Explanation: 
Fix your camera to a tripod and you can record the graceful trails traced by the stars as planet Earth rotates on its axis. For example, this dramatic 5 hour long exposure was made on February 24 from Haute-Provence Observatory (OHP) in southeastern France. Actually a composite of 300 consecutive 1-minute exposures, the image nicely shows stars near the celestial equator tracing nearly straight lines in projection, while stars north and south of the equator, respectively, appear to circle the north and south celestial poles. Domes at the bottom left and right house the OHP telescopes. Brilliant planet Venus makes the short bright trail at the lower right, while trails of stars in the constellation Orion end near the lower right observatory dome. Sirius, alpha star of Canis Major, traces the bright arc over the dome at the left. Astronomer Alexandre Santerne also briefly illuminated a foreground oak tree during the exposure sequence. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


North Celestial Tree
* Image Credit & Copyright: Jerónimo Losada

Explanation:
If you climbed this magnificent tree, it looks like you could reach out and touch the North Celestial Pole at the center of all the star trail arcs. The well-composed image was recorded over a period of nearly 2 hours as a series of 30 second long, consecutive exposures on the night of October 5. The exposures were made with a digital camera fixed to a tripod near Almaden de la Plata, province of Seville, in southern Spain, planet Earth. Of course, the graceful star trails reflect the Earth's daily rotation around its axis. By extension, the axis of rotation leads to the center of the concentric arcs in the night sky. Convenient for northern hemisphere night sky photographers and celestial navigators alike, the bright star Polaris is very close to the North Celestial Pole and so makes the short bright trail in the central gap between the leafy branches.

https://apod.nasa.gov/apod/ap131023.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2013 October 23

North Celestial Tree
 * Image Credit & Copyright: Jerónimo Losada

Explanation: 
If you climbed this magnificent tree, it looks like you could reach out and touch the North Celestial Pole at the center of all the star trail arcs. The well-composed image was recorded over a period of nearly 2 hours as a series of 30 second long, consecutive exposures on the night of October 5. The exposures were made with a digital camera fixed to a tripod near Almaden de la Plata, province of Seville, in southern Spain, planet Earth. Of course, the graceful star trails reflect the Earth's daily rotation around its axis. By extension, the axis of rotation leads to the center of the concentric arcs in the night sky. Convenient for northern hemisphere night sky photographers and celestial navigators alike, the bright star Polaris is very close to the North Celestial Pole and so makes the short bright trail in the central gap between the leafy branches. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


A Night at Poker Flat
* Image Credit: NASA / Jamie Adkins

Explanation:
Four NASA suborbital sounding rockets leapt into the night on January 26, from the University of Alaska's Poker Flat Research Range. This time lapse composite image follows all four launches of the small, multi-stage rockets to explore winter's mesmerizing, aurora-filled skies. During the exposures, stars trailed around the North Celestial Pole, high above the horizon at the site 30 miles north of Fairbanks, Alaska. Lidar, beams of pulsed green lasers, also left traces through the scene. Operating successfully, the payloads lofted were two Mesosphere-Lower Thermosphere Turbulence Experiments (M-TeX) and two Mesospheric Inversion-layer Stratified Turbulence (MIST) experiments, creating vapor trails at high altitudes to be tracked by ground-based observations.

https://apod.nasa.gov/apod/image/1501/PFlatLaunch_compositeJan26_0.jpg

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2015 January 30

A Night at Poker Flat
 * Image Credit: NASA / Jamie Adkins

Explanation: 
Four NASA suborbital sounding rockets leapt into the night on January 26, from the University of Alaska's Poker Flat Research Range. This time lapse composite image follows all four launches of the small, multi-stage rockets to explore winter's mesmerizing, aurora-filled skies. During the exposures, stars trailed around the North Celestial Pole, high above the horizon at the site 30 miles north of Fairbanks, Alaska. Lidar, beams of pulsed green lasers, also left traces through the scene. Operating successfully, the payloads lofted were two Mesosphere-Lower Thermosphere Turbulence Experiments (M-TeX) and two Mesospheric Inversion-layer Stratified Turbulence (MIST) experiments, creating vapor trails at high altitudes to be tracked by ground-based observations. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


The Windmill and the Star Trails
* Image Credit & Copyright: Antonio Gonzalez

Explanation:
Stars can't turn these old wooden arms, but it does look like they might in this scene from a rotating planet. The well-composed night skyscape was recorded from Garafia, a municipality on the island of La Palma, Canary Islands, planet Earth. The center of the once working windmill, retired since 1953, is lined-up with the north celestial pole, the planet's rotation axis projected on to the northern sky. From a camera fixed to a tripod, the star trails are a reflection of the planet's rotation traced in a digital composite of 39 sequential exposures each 25 seconds long. Brought out by highlighting the final exposure in the sequence, the stars themselves appear at the ends of their short concentric arcs. A faint band of winter's Milky Way and even a diffuse glow from our neighboring Andromeda Galaxy also shine in the night.

https://apod.nasa.gov/apod/ap200417.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2020 April 17

The Windmill and the Star Trails
 * Image Credit & Copyright: Antonio Gonzalez

Explanation: 
Stars can't turn these old wooden arms, but it does look like they might in this scene from a rotating planet. The well-composed night skyscape was recorded from Garafia, a municipality on the island of La Palma, Canary Islands, planet Earth. The center of the once working windmill, retired since 1953, is lined-up with the north celestial pole, the planet's rotation axis projected on to the northern sky. From a camera fixed to a tripod, the star trails are a reflection of the planet's rotation traced in a digital composite of 39 sequential exposures each 25 seconds long. Brought out by highlighting the final exposure in the sequence, the stars themselves appear at the ends of their short concentric arcs. A faint band of winter's Milky Way and even a diffuse glow from our neighboring Andromeda Galaxy also shine in the night. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


North Celestial Aurora
* Image Credit & Copyright: Chirag Upreti

Explanation:
Graceful star trail arcs reflect planet Earth's daily rotation in this colorful night skyscape. To create the timelapse composite, on May 12 consecutive exposures were recorded with a camera fixed to a tripod on the shores of the Ashokan Reservoir, in the Catskills region of New York, USA. North star Polaris is near the center of the star trail arcs. The broad trail of a waxing crescent Moon is on the left, casting a strong reflection across the reservoir waters. With intense solar activity driving recent geomagnetic storms, the colorful aurora borealis or northern lights, rare to the region, shine under Polaris and the north celestial pole.

https://apod.nasa.gov/apod/ap240518.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2024 May 18

North Celestial Aurora
 * Image Credit & Copyright: Chirag Upreti

Explanation: 
Graceful star trail arcs reflect planet Earth's daily rotation in this colorful night skyscape. To create the timelapse composite, on May 12 consecutive exposures were recorded with a camera fixed to a tripod on the shores of the Ashokan Reservoir, in the Catskills region of New York, USA. North star Polaris is near the center of the star trail arcs. The broad trail of a waxing crescent Moon is on the left, casting a strong reflection across the reservoir waters. With intense solar activity driving recent geomagnetic storms, the colorful aurora borealis or northern lights, rare to the region, shine under Polaris and the north celestial pole. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Amber Straughn Specific rights apply.
NASA Web Privacy, Accessibility Notices
A service of: ASD at NASA / GSFC,
NASA Science Activation
& Michigan Tech. U.


Sky Full of Arcs
* Image Credit & Copyright: Rory Gannaway

Explanation:
On August 11 a Rocket Lab Electron rocket launched from a rotating planet. With a small satellite on board its mission was dubbed A Sky Full of SARs (Synthetic Aperture Radar satellites), departing for low Earth orbit from Mahia Peninsula on New Zealand's north island. The fiery trace of the Electron's graceful launch arc is toward the east in this southern sea and skyscape, a composite of 50 consecutive frames taken over 2.5 hours. Fixed to a tripod, the camera was pointing directly at the South Celestial Pole, the extension of planet Earth's axis of rotation in to space. But no bright star marks that location in the southern hemisphere's night sky. Still, the South Celestial Pole is easy to spot. It lies at the center of the concentric star trail arcs that fill the skyward field of view.

https://apod.nasa.gov/apod/ap240817.html

#space #earth #astrophotography #photography #astroart #art #science #nature #education

2024 August 17

Sky Full of Arcs
 * Image Credit & Copyright: Rory Gannaway

Explanation: 
On August 11 a Rocket Lab Electron rocket launched from a rotating planet. With a small satellite on board its mission was dubbed A Sky Full of SARs (Synthetic Aperture Radar satellites), departing for low Earth orbit from Mahia Peninsula on New Zealand's north island. The fiery trace of the Electron's graceful launch arc is toward the east in this southern sea and skyscape, a composite of 50 consecutive frames taken over 2.5 hours. Fixed to a tripod, the camera was pointing directly at the South Celestial Pole, the extension of planet Earth's axis of rotation in to space. But no bright star marks that location in the southern hemisphere's night sky. Still, the South Celestial Pole is easy to spot. It lies at the center of the concentric star trail arcs that fill the skyward field of view. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Amber Straughn Specific rights apply.
NASA Web Privacy, Accessibility Notices
A service of: ASD at NASA / GSFC,
NASA Science Activation
& Michigan Tech. U.


 
2020 February 12

Star Trails of the North and South
 * Image Credit & Copyright: Saeid Parchini

Explanation: 
What divides the north from the south? It all has to do with the spin of the Earth. On Earth's surface, the equator is the dividing line, but on Earth's sky, the dividing line is the Celestial Equator -- the equator's projection onto the sky.  You likely can't see the Earth's equator around you, but anyone with a clear night sky can find the Celestial Equator by watching stars move.  Just locate the dividing line between stars that arc north and stars that arc south. Were you on Earth's equator, the Celestial Equator would go straight up and down.  In general, the angle between the Celestial Equator and the vertical is your latitude.  The featured image combines 325 photos taken every 30 seconds over 162 minutes. Taken soon after sunset earlier this month, moonlight illuminates a snowy and desolate scene in northwest Iran. The bright streak behind the lone tree is the planet Venus setting. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


2020 April 7

A Path North
Image Credit & Copyright: Mario Konang

Explanation: 
What happens if you keep going north? The direction north on the Earth, the place on your horizon below the northern spin pole of the Earth -- around which other stars appear to slowly swirl, will remain the same. This spin-pole-of-the-north will never move from its fixed location on the sky -- night or day -- and its height will always match your latitude. The further north you go, the higher the north spin pole will appear. Eventually, if you can reach the Earth's North Pole, the stars will circle a point directly over your head. Pictured, a four-hour long stack of images shows stars trailing in circles around this north celestial pole. The bright star near the north celestial pole is Polaris, known as the North Star. The bright path was created by the astrophotographer's headlamp as he zigzagged up a hill just over a week ago in Lower Saxony, Germany. The astrophotographer can be seen, at times, in shadow. Actually, the Earth has two spin poles -- and much the same would happen if you started below the Earth's equator and went south. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


I rarely see such articles:

"Enough with unicorns and dinosaurs – show children the magic of real, living animals instead" - https://www.theguardian.com/commentisfree/2025/mar/13/children-unicorns-dinosaurs-living-animals-environmentalists

Congrats. We need more of these! And TROMnews is meant to bring such articles to light.

The real world is many times more mindblowing than any movie, book, or story humans have invented. Not to mention it is real. If we want people to care about it, then they have to know about it. Expose children to real wonders, real stories, real life.

#nature #education


Mystery AI Hype Theater 3000, Episode 45 - Billionaires, Influencers, and Ed Tech (feat. Adrienne Williams)



On the two year anniversary of joining #Mastodon I'm super proud to share:

🚀 The Future is Federated - issue no.13 👩‍🚀

"The #Fediverse has empowered me to take back control from Big Tech. Now I want to help others do the same."

https://blog.elenarossini.com/the-fediverse-has-empowered-me-to-take-back-control-from-big-tech-now-i-want-to-help-others-do-the-same/

with mentions of @forgeandcraft (who made this awesome Fediverse t-shirt) @phanpy @ivory @Tusky @nimi @Roneyb @davidoclubb

#FOSS #FLOSS #Matrix #TheFutureIsFederated #blog #tech #activism #BigTech #socialmedia #education


My kid’s school has a holistic grading approach to periodical report cards, eschewing numbers and letters for a vague distance from grade expectations. Kids are either short of grade expectations, meeting them or exceeding them.

I understand the intent not to get fixated on a rigid alphanumerical scale, but it’s still possible to compare between disciplines. On their most recent report card, my 4th grade kid has been above grade in all the graded disciplines except writing where they “only” meet expectations, and I’ve been having the knee-jerk thought that they somehow needed more writing practice, which they absolutely don’t need.

#parenting #education


In case folks aren't aware, the Internet Archive now has a scholar version with a huge collection of academic work available.

https://scholar.archive.org/

#academicchatter #academicmastodon #academic #education #open

A screenshot of the Internet Archive Scholar search engine interface


PORN IS SUGARY FUN????

These are the “children’s books” being “banned”. NSFW but Safe for Children?

Paul Hookem 🇺🇸 @PaulHook_em
https://twitter.com/PaulHook_em/status/1701637502505771266/photo/1

"Ha sometimes I worry I watch too much porn, you know?"

"Yeahhh, I know that worry! But there's nothing wrong with enjoying some porn; it's a fun sugary treat"

Title of book: Let's Talk About It: The TEEN'S Guide to Sex, Relationships, and Being a Human (A Graphic Novel)

#Groomers #Pedophilia #ChildSexualAbuse #Education #SchoolBoard #SmashQueerTheory #LeaveThoseKidsAlone #OpPedo #Pedophiles #AntiMAP #AntiKink #PornCulture #RadicalFeminism #RadFem


You wouldn’t have McDonald’s teaching your kids about nutrition or Philip Morris teaching them about maintaining a healthy lifestyle. Why are you happy having a surveillance capitalist like Google or Facebook teaching them about technology?

https://www.bbc.co.uk/ideas/videos/surveillance-capitalism-has-led-us-into-a-dystopia/p06p0tdy

#surveillanceCapitalism #technology #web #education #SiliconValley #BigTech


I find this fascinating and beautiful. An educational work of art depicting the eras of geological time. Note the Anthropocene (us) right on top.

SOURCE -- http://www.dylangibsonillustration.co.uk/

#Science #Art #Education
Drawing as described in post... Sedimentary layers down through the ages include representative fossils from each period. Perched on top, the Anthropocene includes a combination gas station, car wash, and convenience store, along with some high density buildings. A jet airliner is flying above.


Granville T. Woods an #AfricanAmerican inventor gained the name the "Black Edison". He revolutionized the railroad & electric railway industries with his inventions. One newspaper called Woods “the greatest electrician in the world"

Thomas Edison was an inventive genius but is also claimed to be a liar & thief. Woods' patents were unsuccessfully challenged by Thomas Edison twice.

#BlackTwitter #BlackMastodon #BlackHistory
#BlackInventors #Science #Education

https://americacomesalive.com/granville-woods-electrical-expert-inventor/


We created the account at Mastodon only a week ago and this community here grown to over 32,000.

Thank you for welcoming us here, thank you for all boosts, comments, advice, support and your engagement.

We are still learning and try to find our specific language on this platform. Your feedback is much appreciated.

Remember with us and amplify our voice.

#mastodon #Memorial #NeverForget #history #education #memory #Remember #followerpower #follow #Holocaust #Shoah #community #fediverse


Are you a teacher?

Please share what #FreeSoftware do you use at #school so we can exchange solutions.

For example, at my online course I use for myself and students:

- GNU/Linux
- LibreOffice Writer
- LibreOffice Calc
- LibreOffice Impress
(Open Document Format is mandatory for all)
- Firefox browser
- Jitsi Meet
- GCC
- Geany
- WordPress
- CryptPad
- F-Droid

If you love #education, please boost.
Jitsi Meet, an online video conferencing teachers should choose instead of Zoom or Google Meet.


Pubertet - [8/8] - What's the deal with puberty


"What's the deal with puberty?"

With english subtitles.

Newton is a science programme for children and young people. The target group is from 8 to 12 years, that is to say children who have either entered puberty or are about to.

https://www.nrk.no/ytring/why-we-show-children-how-sex-works-1.12371270


Pubertet - [7/8] - Zits and sweat


"Zits and sweat"

With english subtitles.

Newton is a science programme for children and young people. The target group is from 8 to 12 years, that is to say children who have either entered puberty or are about to.

https://www.nrk.no/ytring/why-we-show-children-how-sex-works-1.12371270