#comet3i — Public Fediverse posts

The interstellar object 3I/ATLAS was discovered on July 1, 2025. There is currently no evidence to suggest that it is anything other than a natural astrophysical object. However, given the small number of such objects known (only three to date), and the plausibility of interstellar probes as a technosignature (a sign of extraterrestrial intelligence), a thorough study is warranted.

#seti #space #science #comet3i

In our latest #SETILive #podcast, Franck asked Dr. Ariel Graykowski what it meant that an analysis of #Comet3I/ATLAS revealed a lack of water in the coma. Possibly, it meant that CO2 sublimation was cooling the local area around the nucleus and delaying water sublimation since water was detected as well. Listen to the full episode: https://feeds.libsyn.com/462636/rss

#space #science

WAS's Phil Harrington was up early this morning and captured our interstellar interloper, Comet 3I/ATLAS, with his Celestron Origin astrograph. A gorgeous look at a comet that keeps everyone guessing.

Curious about all the supposed “anomalies”? Astronomer Jason Wright breaks it down without the sci-fi spin:
https://sites.psu.edu/astrowright/2025/11/09/loebs-3i-atlas-anomalies-explained/

#Comet3I #ATLAS #InterstellarVisitor #Astrophotography #CelestronOrigin #WestportAstronomicalSociety #Astronomy

Next #SETILive: Comet 3I/ATLAS Perihelion Update
TODAY, 31 October, 1:00 pm PDT / 4:00 pm EDT

What happens when a visitor from another star system drops by? Join planetary astronomers Franck Marchis and Ariel Graykowski for a special SETI Live all about Comet 3I/ATLAS — only the third known interstellar object ever detected!

WATCH LIVE: https://youtube.com/live/zaVO-ufmgJg

#space #science #comet3I

ESA’s space probe #JUICE is headed towards a truly unexpected encounter: on November 2nd, observations of interstellar object #3I/ATLAS will begin. Read more about contributions from #mpsgoettingen to the campaign here: www.mps.mpg.de/juice-and-3i... #comet3i #comet3iatlas

JUICE and 3I/ATLAS: An Unexpec...

ESA’s space probe #JUICE is headed towards a truly unexpected encounter: on November 2nd, observations of interstellar object #3IATLAS will begin. Read more about contributions from #mpsgoettingen to the campaign here: https://www.mps.mpg.de/juice-and-3iatlas-an-unexpected-encounter-in-space

#comet3iatlas #comet3i

#Interstellar Objects Like #Comet3I /ATLAS Could Act As #Planetary Seeds

https://www.universetoday.com/articles/interstellar-objects-like-comet-3iatlas-could-act-as-planetary-seeds

I was hopeful about 3I/ATLAS being something different. But I think it will turn out just another piece of rock or a ball of ice 😔

#comet3iatlas #comet3i #comet

We’re not alone. What are we going to do about it?

This immersive “Situation Room” experience puts you at the table with scientists, strategists, and educators to debate humanity’s next move — in real time. As 3I/ATLAS or some other interstellar object approaches Earth, you decide: respond, retreat, or do nothing?

Vote for our #SXSW2026 panel: https://participate.sxsw.com/flow/sxsw/sxsw26/community-voting-sxsw/page/community-voting/session/1752013334355001BvhN

#panelpicker #sxsw #seti #arewealone #interstellar #comet3I

@n_dimension @wordmark Which existing satellites orbiting Mars can be repurposed for observing #3i_atlas? Most of the satellites observing #mars are tuned for that purpose. They might not be able to do a full spectrography observation of #comet3i.
Can the #rovers on the #mars surface have a look at it?

#3i_atlas #comet3i is a 20 km object that's just been discovered entering our solar system a few weeks ago. There are many super curious/suspicious things about it. If it's a normal comet, it's a lottery winner.

- It's entered our solar system within 5% of the plane of the ecliptic.
- It's entered from the galactic disk, meaning we didn't see it until the last moment (attacking from the sun)
- it's moving at 60 km /sec, we are unable to catch up to it with our best rockets
- it will pass very close to mars, Venus and Jupiter.
- it will pass fastest, on the other side of the sun, masked from earth, the perfect time to execute a deacceleration burn. Coincidently the best time to deploy vessels.
- it's not venting gasses as comets usually do, as far as we can tell. So it's very solid.

Combined those "coincidences" mean it's 0.02% probability it's a natural event.

It could well be a comet, but if it is, it's behaving exactly like a vehicle entering an occupied system would behave. #jameswebb is going to examine it in August.

If it does execute brake burn at the sun we will see it in our orbit, November, December this year.
And with the US smashing things with hammers, humanity will have degraded response options.
#astronomy #aliens