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EarthSky
@earthskyscience.bsky.social
2.9K followers 240 following 2.7K posts
Updates on your cosmos and world.
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earthskyscience.bsky.social
#CometLemmon reaches #perihelion! Hassan Abdollahabadi in Chelpo Village, Rivash, Iran, captured this stunning shot of the comet on Saturday. Thank you, Hassan! ☄️🔭📸
buff.ly/BDXFrNb

Go to EarthSky Community Photos to see more great images, and submit your own recent photos:

buff.ly/RyXeYSP
Bright, white spot in starry night sky, with 2 long tails coming off it, one fuzzier than the other one. A deep ravine and mesas are in the foreground.
November 11, 2025 at 1:00 AM
earthskyscience.bsky.social
Check out the #sun in black and white! Eliot Herman in Tucson, Arizona, captured this beautiful image using a calcium filter, yesterday. Thank you, Eliot! ☀️🔭📸
buff.ly/JqttV4j

See more great images, and submit your own recent photos, at EarthSky Community Photos:

buff.ly/RyXeYSP
Sphere in black and white, with finely mottled surface and several dark and lighter spots, on black background.
November 10, 2025 at 11:00 PM
earthskyscience.bsky.social
#EarthSky isn't powered by billionaires. We’re powered by you. Support EarthSky’s 2025 Donation Campaign and help keep #science accessible. Plus ... with any #donation of $100 or more, we'll send you a FREE 2026 EarthSky Lunar Calendar! 🌎🌌🚀

Visit here for more information:
buff.ly/8Cu6Y1J
Cartoon of astronaut jumping over a yellow moon with craters, in deep blue space with stars. Bold white text says 'We're over the moon for your support.'
November 10, 2025 at 6:01 PM
earthskyscience.bsky.social
Hi stargazers! Late this evening, the waning gibbous #moon will shine near Jupiter and the twin stars of #Gemini, Castor and Pollux. It will also cozy up to the #Beehive star cluster, though its bright light will wash out the fainter stars. 🌖🔭

For more events visit:
buff.ly/mS6e8Eb

📹 EarthSky.org.
November 10, 2025 at 4:32 PM
earthskyscience.bsky.social
Interesting! Scientists have discovered a new species of sea #anemone that inhabits the depths of the Pacific Ocean off the coast of Japan. It creates a kind of #shell using its own secretions to house #hermitcrabs, forming a unique symbiotic relationship. 🐚🦀
buff.ly/1ja7tLZ

📸 Yoshikawa et al.
4 images of a pinkish, round creature with tentacles at the top, attached to a small crab.
November 10, 2025 at 4:05 PM
earthskyscience.bsky.social
For the 2nd time in just 24 hours, #sunspot region AR4274 erupted with a powerful X flare, keeping solar activity at very high levels. This could potentially bring G1-G2 (minor-moderate) geomagnetic storms and auroral displays to northerly latitudes:
buff.ly/jj48ZHH

📸 NASA/ SDO/ SOHO/ JHelioviewer.
Orange sphere with a very bright area at the top right.
November 10, 2025 at 3:30 PM
earthskyscience.bsky.social
#EarthSky isn't powered by billionaires. We’re powered by you. Support EarthSky’s 2025 Donation Campaign and help keep #science accessible. Plus ... with any #donation of $100 or more, we'll send you a FREE 2026 EarthSky Lunar Calendar! 🌎🌌🚀

Visit here for more information!
buff.ly/8Cu6Y1J
Cartoon alien and astronaut with the text Help us keep sharing Earth and Sky news with everyone - donate today.
November 9, 2025 at 6:03 PM
earthskyscience.bsky.social
If you're in Earth's western hemisphere late tonight, look for 4 objects in an approximate line on the sky's dome. They are the waning gibbous #moon, bright #Jupiter and Gemini's twin stars. Read when you can see them at : buff.ly/lAuE1tG

📸 EarthSky.
Slightly bulging gibbous moon between 3 bright dots labeled Castor, Pollux, and Jupiter, near the steep green ecliptic line.
November 9, 2025 at 5:33 PM
earthskyscience.bsky.social
Fifty years ago tomorrow, November 10, the Great Lakes’ most famous shipwreck claimed the lives of 29 men. SS #EdmundFitzgerald, a 729-foot freighter, sank in Lake Superior. Read about the tragedy: buff.ly/NYMctdR

📸 Greenmars/ Wikimedia Commons. CC BY-SA 3.0.
Huge ship, very long with superstructure at both ends, and smoke coming out of a large funnel or smokestack at the stern end. The hull is painted red and the name Edmund Fitzgerald is painted on the bow.
November 9, 2025 at 4:33 PM
earthskyscience.bsky.social
Blue Origin’s New Glenn rocket will launch the #ESCAPADE mission - headed for #Mars - today. The launch window opens at 2:45 p.m. EST today. Watch the launch - and learn about Mars' magnetic environment - here: buff.ly/bTlafKQ

📸 Rocket Lab/ UC Berkeley.
Twin spacecraft with large solar panels with Mars in the background and launch window details shown in text above the planet.
November 9, 2025 at 4:03 PM
earthskyscience.bsky.social
Ten trillion times brighter than the sun and 10 billion light years away! What happened here to create the biggest and most distant #blackhole flare we’ve ever seen? Find out at buff.ly/RgwNVYD

📸 Caltech/ R. Hurt (IPAC).
A bright explosion within a swirling accretion disk around a black hole, with text describing a record-breaking flare.
November 9, 2025 at 3:33 PM
earthskyscience.bsky.social
Extreme weather incoming! The #jetstream moving south means cold air spilling into the U.S. as far south as Texas. Read more at: buff.ly/827wYAI

📸 NWS.
Map of eastern US with large purple area fading to lighter colors at the edges.
November 9, 2025 at 3:05 PM
earthskyscience.bsky.social
The #sun exploded with a powerful X1.8-class flare at 7:01 UTC this morning (November 9). The flare marked a dramatic surge to very high activity levels on the sun. The eruption also sent a blob of blob of material in Earth's direction.

Read the sun news at: buff.ly/jj48ZHH

📸 SDO/ JHelioviewer.
SDO ultraviolet view of the Sun glowing in teal, showing swirling active regions and bright flares.
November 9, 2025 at 2:48 PM
earthskyscience.bsky.social
#EarthSky isn't powered by billionaires. We’re powered by you. Support EarthSky’s 2025 Donation Campaign and help keep #science accessible. Plus ... with any #donation of $100 or more, we'll send you a FREE 2026 EarthSky Lunar Calendar! 🌎🌌🚀

Visit here for more information!
buff.ly/8Cu6Y1J
Cartoon of an ailen and an astronaut with the text Help us keep sharing Earth and sky news with everyone - donate today.
November 8, 2025 at 6:03 PM
earthskyscience.bsky.social
Jelieta Walinski captured the lovely Belt of Venus above Earth's shadow Wednesday from Arizona. Thank you, Jelieta! Read about Earth's shadow here: buff.ly/EzEogHk

Have a photo of your own to share? Submit it here!
buff.ly/0C2j6vH
A pink, fuzzy band across the sky above a darker band on the mountainous hoizon, with labels for each band.
November 8, 2025 at 5:33 PM
earthskyscience.bsky.social
#Comet Lemmon (C/2025 A6) - the best comet of 2025 - reaches its closest point to our sun today. Then it'll speed its way to the dark outer solar system. You can still see Comet Lemmon. Here's how: buff.ly/cBAQfRr

📸 Raúl Cortés.
Bright comet Lemmon with long glowing tail against a starry sky, with text about its 2025 perihelion and return.
November 8, 2025 at 5:03 PM
earthskyscience.bsky.social
Look for the #moon, #Jupiter and Gemini's #Castor and #Pollux from late tonight through dawn Sunday.. Check this video: buff.ly/6eFeQ7u

Visit EarthSky’s night sky guide for more, at: buff.ly/lAuE1tG
November 8, 2025 at 4:04 PM
earthskyscience.bsky.social
New research shows that giant #Jupiter's early growth sculpted the solar system ... and may have kept Earth from falling into the sun. Read about it here, at: buff.ly/wfMOa41

📸 NASA.
Closeup of a banded planet with iarge red oval among the bands , with the caption “Did Jupiter Save Earth?” below the planet.
November 8, 2025 at 4:03 PM
earthskyscience.bsky.social
#Auroras danced across the skies last night as blasts of solar material arrived at Earth. Observers saw colorful displays in the U.S. and Europe. More coming? Read the sun news at: buff.ly/jj48ZHH

📸 Barbara Klassen.
Green aurora swirls above a rural horizon with a bright meteor streaking through the night sky.
November 8, 2025 at 3:48 PM
earthskyscience.bsky.social
Eliot Herman in Tucson, Arizona captured this photograph of #comet A6 Lemmon near star cluster Messier 12. Thank you, Eliot!
buff.ly/zGuyZRX

Have a photo of your own to share? Submit it here!
buff.ly/0C2j6vH
Bright comet with long tail at lower left, star-filled sky, and a small star cluster at upper right.
November 8, 2025 at 3:33 PM
earthskyscience.bsky.social
#EarthSky isn't powered by billionaires. We’re powered by you. Support EarthSky’s 2025 Donation Campaign and help keep #science accessible. Plus ... with any #donation of $100 or more, we'll send you a FREE 2026 EarthSky Lunar Calendar! 🌎🌌🚀

Visit here for more information!
buff.ly/8Cu6Y1J
An alien and astronaut cartoons sitting on a green planet giving peace signs with the words, "Help us keep sharing Earth and Sky news with everyone - donate today."
November 7, 2025 at 6:04 PM
earthskyscience.bsky.social
Tonight, the waning #moon drifts past some of the sky’s brightest stars — Capella, Betelgeuse, and Aldebaran — and heads toward Jupiter, the brightest “star” of them all. Catch them all from late at night through dawn Saturday! Read more at: buff.ly/lAuE1tG

📸 EarthSky.
Chart showing a fat hemisphere, the moon, between two dots, the stars Capella and Aldebaran. On the next night, the fat hemisphere lies midway between two dots, the stars Capella and Betelgeuse.
November 7, 2025 at 5:33 PM
earthskyscience.bsky.social
Meet the star #Almach in the constellation Andromeda. It shines as a beautiful double star system — one golden and one blue — but peek closer. You’ll discover Almach is really 4 stars dancing together. Read more at: buff.ly/APbwxQu

📸 Antonsusi/ Wikipedia.
3 intersecting ovals, 1 large and 2 small, with colored dots representing stars labeled A, C, Ba and Bb.
November 7, 2025 at 5:06 PM
earthskyscience.bsky.social
Earth crosses Halley’s Comet’s orbit twice a year, giving us the Eta Aquariids and Orionids meteor showers. But could the #comet itself ever collide with us? Watch this video to find out: buff.ly/syLshmH
Smiling woman in front of a dramatic asteroid impact on Earth with the word ‘BOOM?’ above her.
November 7, 2025 at 4:33 PM
earthskyscience.bsky.social
Portrait of Edmond Halley with text celebrating his birthday and noting he proved comets orbit the sun.
November 7, 2025 at 4:05 PM