Recent searches

No recent searches

Search options

Only available when logged in.
mstdn.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
A general-purpose Mastodon server with a 500 character limit. All languages are welcome.

Administered by:

Server stats:

11K
active users

mstdn.social: AboutStatusProfiles directoryPrivacy policyTerms of service

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.4.1

#astrophotography

175 posts89 participants22 posts today
World Beauty :verified:<p>Aurora and Light Pillars over Norway<br>Credits: Alexandre Correia<br><a href="https://universeodon.com/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://universeodon.com/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://universeodon.com/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a></p>
Dan Clover PhotographyPeeking 🫣 <a href="https://pixelfed.social/discover/tags/astrophotography?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#astrophotography</a> <a href="https://pixelfed.social/discover/tags/photography?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#photography</a> <a href="https://pixelfed.social/discover/tags/digitalphotography?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#digitalphotography</a> <a href="https://pixelfed.social/discover/tags/nightskyphotography?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#nightskyphotography</a> <a href="https://pixelfed.social/discover/tags/pnw?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#pnw</a> <a href="https://pixelfed.social/discover/tags/oregon?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#oregon</a> <a href="https://pixelfed.social/discover/tags/milkyway?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#milkyway</a> <a href="https://pixelfed.social/discover/tags/owyheeriver?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#owyheeriver</a>
Martin Junius<p>Night in Namibia 2023-2025 </p><p>Two years in the making, here comes a new Night in Namibia time-lapse video.</p><p><a href="https://www.youtube.com/watch?v=Wmk_fOEy-yI" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">youtube.com/watch?v=Wmk_fOEy-yI</span><span class="invisible"></span></a><br><a href="https://photo.m-j-s.net/blog/2025/07/night-in-namibia-2023-2025/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">photo.m-j-s.net/blog/2025/07/n</span><span class="invisible">ight-in-namibia-2023-2025/</span></a></p><p>BTW: looking for a PeerTube instance to host my time-lapse videos! Hints welcome.</p><p><a href="https://mastodon.social/tags/astrofotografie" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrofotografie</span></a> <a href="https://mastodon.social/tags/astronomie" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomie</span></a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://mastodon.social/tags/EN" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>EN</span></a> <a href="https://mastodon.social/tags/hakos" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hakos</span></a> <a href="https://mastodon.social/tags/ias" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ias</span></a> <a href="https://mastodon.social/tags/namibia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>namibia</span></a> <a href="https://mastodon.social/tags/nightscapes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nightscapes</span></a> <a href="https://mastodon.social/tags/timelapse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>timelapse</span></a> <a href="https://mastodon.social/tags/video" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>video</span></a></p>
UniversoMagico<p><a href="https://social.vivaldi.net/tags/UMPlus" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UMPlus</span></a> - GK Perseii by Antoine Grelin</p><p><a href="https://www.universomagico.net/2025/07/gk-perseii-por-antoine-grelin.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">universomagico.net/2025/07/gk-</span><span class="invisible">perseii-por-antoine-grelin.html</span></a></p><p>This excellent image by astronomer Antoine Grelin shows GK Perseii, a star that has become a nova and exhibits additional nebulae in OIII and H-alpha than those seen in RGB. Hover over the image to toggle the two views. It is located in the direction of the Perseus constellation and lies at a distance of about.....<br><a href="https://social.vivaldi.net/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://social.vivaldi.net/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://social.vivaldi.net/tags/astrophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophysics</span></a> <a href="https://social.vivaldi.net/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a></p>
Universo Mágico<p><a href="https://mastodon.online/tags/UMPlus" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UMPlus</span></a> - GK Perseii by Antoine Grelin</p><p><a href="https://www.universomagico.net/2025/07/gk-perseii-por-antoine-grelin.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">universomagico.net/2025/07/gk-</span><span class="invisible">perseii-por-antoine-grelin.html</span></a></p><p>This excellent image by astronomer Antoine Grelin shows GK Perseii, a star that has become a nova and exhibits additional nebulae in OIII and H-alpha than those seen in RGB. Hover over the image to toggle the two views. It is located in the direction of the Perseus constellation and lies at a distance of about.....<br><a href="https://mastodon.online/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.online/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://mastodon.online/tags/astrophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophysics</span></a> <a href="https://mastodon.online/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a></p>
DGMc<p>The Elephant Trunk Nebula IC1396A in the constellation Cepheus. About 2400 light years form earth. Dark nebula that is thought to be a region of star formation.<br>Imaged with an ASI2600mc and a Celestron 9.25 with Starizona .63x reducer. From the backyard in my new location in rural Michigan with solid Bortle 3 skies (that translates to REALLY dark).<br><a href="https://mastodon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a></p>
Astrobin Image of the Day<p>28-07-2025 Image Of The Day<br><a href="https://app.astrobin.com/u/NBeltraminelli?i=qc27nw#gallery" rel="nofollow noopener" target="_blank">https://app.astrobin.com/u/NBeltraminelli?i=qc27nw#gallery</a><br>Omega nebula in HS_SHO-RGB combination by Nicola Beltraminelli<br><a href="https://fedi.stfn.pl/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a></p>
grobi<p>Q: Is it Possible 2024 YR4 Could Impact the Moon?</p><p>A: Asteroid 2024 YR4 has a very small chance of impacting the Moon on Dec. 22, 2032. If the asteroid were to impact the Moon, it would not alter its orbit. </p><p>Q: Is it Possible to Deflect Asteroid 2024 YR4? Could We Use a Spacecraft Similar to DART? </p><p>A: A kinetic impactor spacecraft like NASA’s Double Asteroid Redirection Test (DART) mission is one asteroid deflection technique that could be used to address a potentially hazardous asteroid in the future. Each asteroid is unique, and deflection would depend on the asteroid’s size, physical properties, orbit, and discovery warning time. 2024 YR4 poses no significant impact risk to the planet, and thus it is premature to speculate on potential deflection techniques for this asteroid.</p><p>"Let's look at what happened back then:"</p><p>Collision at Asteroid Dimorphos<br>Video Credit: ASI NASA, Johns Hopkins APL, DART, LICIACube, LUKE, IOP</p><p>Explanation: <br>Why was this collision so strange? In 2022, to develop Earth-saving technology, NASA deliberately crashed the DART spacecraft into the asteroid moonlet Dimorphos. The hope was that this collision would alter the trajectory of Dimorphos around its parent asteroid Didymos and so demonstrate that similar collisions could, in theory, save the Earth from being hit by (other) hazardous asteroids. But analyses of new results show that the effects of the collision are different than expected -- and we are trying to understand why. Featured here is the time lapse video taken by the ejected LICIACube camera LUKE showing about 250 seconds of the expanding debris field of Dimorphos after the collision, with un-impacted Didymos passing in the foreground. In 2026, Europe's Hera mission will reach the asteroids and release three spacecraft to better study the matter.</p><p><a href="https://apod.nasa.gov/apod/ap250728.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250728.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/asteroids" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>asteroids</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/tech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tech</span></a> <a href="https://defcon.social/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a> <a href="https://defcon.social/tags/defense" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>defense</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>For all those who would like to see the position of the asteroid in space as an interactive 3D model, here is the direct link to the app:</p><p><a href="https://eyes.nasa.gov/apps/asteroids/#/2024_yr4" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">eyes.nasa.gov/apps/asteroids/#</span><span class="invisible">/2024_yr4</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/asteroids" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>asteroids</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/tech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tech</span></a> <a href="https://defcon.social/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a> <a href="https://defcon.social/tags/defense" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>defense</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
ND<p><a href="https://flipboard.com/tag/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Astrophotography</span></a></p><p><a href="https://petapixel.com/2025/07/28/nasa-captures-haunting-photos-of-lightning-illuminating-a-tropical-storm/?utm_source=flipboard&amp;utm_medium=activitypub" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">petapixel.com/2025/07/28/nasa-</span><span class="invisible">captures-haunting-photos-of-lightning-illuminating-a-tropical-storm/?utm_source=flipboard&amp;utm_medium=activitypub </span></a></p><p>Posted into DEPTH OF FIELD <span class="h-card" translate="no"><a href="https://flipboard.com/@nndflip/depth-of-field-htkfqrptz" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>depth-of-field-nndflip</span></a></span></p>
grobi<p>2024 YR4 Facts<br>NASA Science Editorial Team</p><p>Asteroid 2024 YR4 is a near-Earth asteroid, meaning it is an asteroid in an orbit that brings it into Earth’s region of the solar system. When it was first discovered, it appeared to have a very small chance to impact Earth on Dec. 22, 2032. As observations of 2024 YR4 continued through early 2025, NASA concluded the object poses no significant impact risk to Earth in 2032 and beyond.</p><p>New infrared observations from NASA’s James Webb Space Telescope have decreased the uncertainty of the asteroid’s size, and 2024 YR4 is now estimated to be 174-220 feet (53-67 meters), about the size of a 15-story building. The previous size estimate of 131-295 feet (40-90 meters) was derived from visible light measurements from ground-based telescopes. </p><p>This object is of particular interest for planetary defense for two reasons: <br>1) <br>it is large enough to cause localized damage in the unlikely event that it should impact Earth, and <br>2) <br>it surpassed the 1% impact probability threshold to warrant formal notification of the object to other U.S. government agencies involved in planetary defense as well as to the Space Mission Planning Advisory Group and to the United Nations Office of Outer Space Affairs per the International Asteroid Warning Network’s notification charter.</p><p>As more observations of the asteroid’s orbit were obtained, its impact probability became better known and enabled planetary defense experts to determine it poses no significant risk to the planet. <br>[...]<br><a href="https://science.nasa.gov/solar-system/asteroids/2024-yr4-facts/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/solar-system/</span><span class="invisible">asteroids/2024-yr4-facts/</span></a></p><p>FAQ's discussed in this Video:<br>+ What are the chances it’ll hit Earth? <br>+ Why do those odds keep changing? <br>+ And should you be worried? </p><p>Producers: Scott Bednar, Jessie Wilde, Pedro Cota</p><p><a href="https://science.nasa.gov/solar-system/asteroids/2024-yr4/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/solar-system/</span><span class="invisible">asteroids/2024-yr4/</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/asteroids" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>asteroids</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/tech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tech</span></a> <a href="https://defcon.social/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a> <a href="https://defcon.social/tags/defense" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>defense</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
World Beauty :verified:<p>One Night, One Telescope, One Camera<br>Credits: Fernando Cabrerizo, Centro Astronomico de Tiedra<br><a href="https://universeodon.com/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://universeodon.com/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://universeodon.com/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a></p>
grobi<p>Planetary Defense at NASA</p><p>In 2016, NASA established the Planetary Defense Coordination Office (PDCO) to manage the agency's ongoing mission of finding, tracking, and better understanding asteroids and comets that could pose an impact hazard to Earth. Here you can stay informed about the PDCO, NASA's Near-Earth Object (NEO) Observations Program, and upcoming planetary defense flight missions, including NASA'S NEO Surveyor mission.</p><p>Planetary Defenders</p><p>NASA’s Planetary Defenders is a gripping documentary that delves into the high-stakes world of asteroid detection and planetary defense by journeying alongside NASA’s dedicated team of scientists, astronomers, and engineers who discover, track, and monitor near-Earth asteroids to safeguard Earth from potential impacts. Available now on NASA+ and other streaming platforms.</p><p>How would humanity respond if we discovered an asteroid headed for Earth? NASA’s "Planetary Defenders" is a gripping documentary that delves into the high-stakes world of asteroid detection and planetary defense.</p><p>Short video version<br><a href="https://science.nasa.gov/planetary-defense/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/planetary-def</span><span class="invisible">ense/</span></a></p><p>Full documentary 1:15:03<br><a href="https://science.nasa.gov/science-research/planetary-science/planetary-defense/planetary-defenders/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/science-resea</span><span class="invisible">rch/planetary-science/planetary-defense/planetary-defenders/</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/asteroids" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>asteroids</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/tech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tech</span></a> <a href="https://defcon.social/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a> <a href="https://defcon.social/tags/defense" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>defense</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>June 30, 2017</p><p>NASA Planetary Defense:<br>Backyard Asteroid Observer</p><p>Backyard astronomer Robert Holmes of Westfield, Illinois, is part of NASA's army of observers scanning the night sky for asteroids.</p><p>"We do follow-up observations with NASA's near-Earth observations program. All night long, I'm running big telescopes. One's a 24-inch, a 30-inch, and a 32-inch. And then the 50 inch is my… my biggest telescope [...]."</p><p>"[...] We do follow-up observations for the discoveries that are made by the large sky surveys. By looking at these asteroids, and measuring these asteroids, we can determine what their possibilities of actually hitting the Earth in the future are going to be.</p><p>NASA provides coordinates of specific objects that they need observations on. I'm gonna punch in the coordinates here, and I'm doing this remotely from inside a control room, not at the telescope. And so, we look these objects up and then use those coordinates to look at a tiny piece of the sky that this object happens to be in. And then we follow those objects, and define and refine orbits for those objects, and reduce the uncertainty of where it's going to go in the near future.</p><p>I started off as a volunteer in 2006. It's just blossomed into a full-time opportunity to work for NASA under their grant program, where I'm now doing this every single clear night.</p><p>Now we're starting the observing run for 2017 KK3. You don't build a telescope that's this big without having… being passionate about what you do. I'm really driven to be a part of a program that's important and has importance to the future. And we're not talking about next year or the year after, We're talking about asteroids that could potentially hit the Earth 100 years from now. And the work we do today may make a difference 100 years from now."</p><p><a href="https://www.jpl.nasa.gov/videos/nasa-planetary-defense-backyard-asteroid-observer/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">jpl.nasa.gov/videos/nasa-plane</span><span class="invisible">tary-defense-backyard-asteroid-observer/</span></a></p><p>FYI:<br><a href="https://science.nasa.gov/planetary-defense/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/planetary-def</span><span class="invisible">ense/</span></a></p><p>CREDIT<br>Jet Propulsion Laboratory</p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/asteroids" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>asteroids</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a> <a href="https://defcon.social/tags/defense" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>defense</span></a> <a href="https://defcon.social/tags/tech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tech</span></a></p>
World Beauty :verified:<p>Galaxies Beyond the Heart: Maffei 1 and 2<br>Credits: <a href="https://universeodon.com/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a>, JPL-Caltech, WISE<br><a href="https://universeodon.com/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://universeodon.com/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://universeodon.com/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a></p>
earthling<p>Who spray painted the Moon?</p><p>via world-beauty </p><p>Credits: Galileo Project, JPL, NASA </p><p><a href="https://mastodon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <br><a href="https://mastodon.social/tags/Moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Moon</span></a></p>
grobi<p>TOPIC&gt; About Planetary Defense </p><p>2023 June 30</p><p>Orbits of Potentially Hazardous Asteroids<br> * Illustration Credit: NASA, JPL-Caltech<br><a href="https://www.nasa.gov/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">nasa.gov/</span><span class="invisible"></span></a><br><a href="https://www.jpl.nasa.gov/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">jpl.nasa.gov/</span><span class="invisible"></span></a></p><p>Explanation: <br>Are asteroids dangerous? Some are, but the likelihood of a dangerous asteroid striking the Earth during any given year is low. Because some past mass extinction events have been linked to asteroid impacts, however, humanity has made it a priority to find and catalog those asteroids that may one day affect life on Earth. Pictured here are the orbits of the over 1,000 known Potentially Hazardous Asteroids (PHAs). These documented tumbling boulders of rock and ice are over 140 meters across and will pass within 7.5 million kilometers of Earth -- about 20 times the distance to the Moon. Although none of them will strike the Earth in the next 100 years -- not all PHAs have been discovered, and past 100 years, many orbits become hard to predict. Were an asteroid of this size to impact the Earth, it could raise dangerous tsunamis, for example. To investigate Earth-saving strategies, NASA successfully tested the Double Asteroid Redirection Test (DART) mission in 2022. Of course, rocks and ice bits of much smaller size strike the Earth every day, usually pose no danger, and sometimes create memorable fireball and meteor displays.<br><a href="https://photojournal.jpl.nasa.gov/catalog/PIA17041" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">photojournal.jpl.nasa.gov/cata</span><span class="invisible">log/PIA17041</span></a><br><a href="https://en.wikipedia.org/wiki/Cretaceous%E2%80%93Paleogene_extinction_event" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Cretaceo</span><span class="invisible">us%E2%80%93Paleogene_extinction_event</span></a><br><a href="https://web.archive.org/web/20161210142717/http://nss.org/resources/library/planetarydefense/2000-ReportOfTheTaskForceOnPotentiallyHazardousNearEarthObjects-UK.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">web.archive.org/web/2016121014</span><span class="invisible">2717/http://nss.org/resources/library/planetarydefense/2000-ReportOfTheTaskForceOnPotentiallyHazardousNearEarthObjects-UK.pdf</span></a><br><a href="https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/List_of_</span><span class="invisible">asteroid_close_approaches_to_Earth</span></a></p><p><a href="https://www.jpl.nasa.gov/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">jpl.nasa.gov/</span><span class="invisible"></span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/earth" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earth</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/tech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tech</span></a> <a href="https://defcon.social/tags/defense" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>defense</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
ND<p><a href="https://flipboard.com/tag/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Astrophotography</span></a></p><p><a href="https://www.diyphotography.net/gemini-north-photographs-betelgeuses-hidden-companion/?utm_source=flipboard&amp;utm_medium=activitypub" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diyphotography.net/gemini-nort</span><span class="invisible">h-photographs-betelgeuses-hidden-companion/?utm_source=flipboard&amp;utm_medium=activitypub </span></a></p><p>Posted into DEPTH OF FIELD <span class="h-card" translate="no"><a href="https://flipboard.com/@nndflip/depth-of-field-htkfqrptz" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>depth-of-field-nndflip</span></a></span></p>
World Beauty :verified:<p>Ares 3 Landing Site: The Martian Revisited<br>Credits: HiRISE, MRO, LPL (U. Arizona), <a href="https://universeodon.com/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a><br><a href="https://universeodon.com/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://universeodon.com/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://universeodon.com/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a></p>
⠵⠻⠷⠕⠭ 🍥🍉⚪🌹<p>I want to believe <a href="https://mastodon.social/tags/Nova" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Nova</span></a> <a href="https://mastodon.social/tags/TCoronaBorealis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TCoronaBorealis</span></a> <a href="https://mastodon.social/tags/AstroPhotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AstroPhotography</span></a> <a href="https://mastodon.social/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Astronomy</span></a></p>
TrendingLive feeds
About