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Interstellar comet 3I/ATLAS and asteroid (65) Cybele on 2025-12-05 (11:48 - 12:42 UT). Images: 7x60 sec.

iTelescope.Net T21: 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer in Utah, USA.

@astrodave.bsky.social
@davidbflower.bsky.social

#PhotoHour #StormHour
#3IATLAS #comet3I #interstellarcomet

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My new photos of the interstellar comet 3I/ATLAS:

1- 2025-12-05 with (65) Cybele at 0.43-m iTelescope.Net T21 (U94);
2- 2025-12-15 at T21;
3- 2025-12-19 at the 2-m Liverpool Telescope (J13).
@astrodave.bsky.social
@davidbflower.bsky.social
#PhotoHour #StormHour #3IATLAS #comet3I #interstellarcomet

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My new photos of the interstellar comet 3I/ATLAS:

1- 2025-11-24 at 0.43-m iTelescope.Net T21 (U94);
2- 2025-12-03 at 0.61-m iTelescope.Net T24 (U69);
3- 2025-12-04 at T21;
4- 2025-12-06 at the 2-m Liverpool Telescope (J13).

#3IATLAS #comet3I #interstellarcomet #astronomy
@astrodave.bsky.social

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La comète 3I/ATLAS, messagère cosmique, effectuera sa plus grande approche de la Terre le 19 décembre 2025 Les astronomes auront l'occasion d'étudier de près la comète 3I/ATLAS lors de son maximum d'approche de la Terre le 19 décembre 2025.

La comète 3I/Atlas passera près de la Terre le 19 déc 2025, messagère cosmique à ne pas manquer ! www.tameteo.com/actualites/a... #Space #Science #Astrophysics #Comet3I #CelestialEvent #CosmosAlert

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60s Exposure of Comet 3i/ATLAS

60s Exposure of Comet 3i/ATLAS

I have an interstellar comet in view! This is almost directly over the City of Boston so the light pollution does not help but it's in the center and looks pretty cool.

Wonder if astrometry can identify it @kat-astro-bot.bsky.social

#astronomy #astrophotography #comet3i

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I measured the magnitude of the interstellar comet 3I/ATLAS from my photos (July 17th - October 2nd) using Tycho Tracker v.12.6 software. I used the ATLAS catalog and 10000 km aperture radius.
I am attaching the light curve.
#astronomy #interstellarcomet #comet3I #comet3IATLAS
@astrodave.bsky.social

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Comet 3I/ATLAS Perihelion Update YouTube video by SETI Institute

What do we really know about interstellar comet 3I/ATLAS? I sat down with planetary astronomer Ariel Graykowski for an honest, curiosity-driven discussion—no promo, just science. #astronomy #comet3I www.youtube.com/live/zaVO-uf...

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🌌✨ Comet 3I/ATLAS is streaking across the skies, unlocking hidden energy and spiritual power. 🌠
Ready to manifest on a cosmic level? Don’t miss this moment 👉 shorturl.at/JJMp8

#Manifesting #CosmicMystery #Comet3I #Comet3IATLAS #AstrologyVibes #SpiritualAwakening

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JUICE and 3I/ATLAS: An Unexpected Encounter in Space 3I/ATLAS, the third known interstellar object to date, is currently traveling through the Solar System and reached its closest point to the Sun yesterday. In the next days, 3I/ATLAS is barely visible ...

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

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Original post on academiccloud.social

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: www.mps.mpg.de/juice-and-3iatlas-an-une... […]

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On 2025-10-02 I observed interstellar comet 3I/ATLAS (before passing Mars) at remote 0.25-m f/3.8 reflector T75 iTelescope.Net, Chile. 1st photo is in color.

I also observed it on September 27th - Autumn Astronomy Day.

@astrodave.bsky.social
@davidbflower.bsky.social
#PhotoHour #StormHour #comet3I

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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

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I continue to observe the interstellar comet 3I/ATLAS using remote telescopes: Liverpool Telescope and iTelescope.Net T59, T11, T24.

My astrometry
minorplanetcenter.net/mpec/K25/K25...
minorplanetcenter.net/mpec/K25/K25...

#comet3I #comet3IATLAS #interstellarcomet #PhotoHour
@astrodave.bsky.social

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Hubble capture l’image la plus précise et saisissante à ce jour du visiteur interstellaire 3I/Atlas : voici ce qu’elle révèle Il a été découvert début juillet et depuis, les spéculations vont bon train. Quelle est réellement la nature de 3I/Atlas, ce mystérieux objet interstellaire qui voyage dans notre Système solaire ?...

Hubble dévoile l’image la plus précise de la comète interstellaire 3I/ATLAS, révélant une structure en forme de goutte et une queue de poussière.
www.futura-sciences.com/sciences/act...
#Space #Science #Innovation #Astrophysics #Comet3I #InterstellarVisitor #HubbleTelescope #Astronomy

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Original post on mastodon.social

Hubble dévoile l’image la plus précise de la comète interstellaire 3I/ATLAS, révélant une structure en forme de goutte et une queue de poussière […]

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Follow-up observations of interstellar comet C/2025-N1, a.k.a. 3I/ATLAS, made by Stony Ridge Observatory near Los Angeles on Aug 5, 2025, for the Minor Planet Center. 🔭
#Astronomy #Astrophotography #Comet3I

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I observed interstellar comet 3I/ATLAS remotely at 2-m Liverpool Telescope (image 1) and at 0.3-m T33 (image 2) of iTelescope.Net in Australia.

My astrometric data:
minorplanetcenter.net/mpec/K25/K25...
minorplanetcenter.net/mpec/K25/K25...

@astrodave.bsky.social @davidbflower.bsky.social
#comet3I

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La comète interstellaire 3I/Atlas plus vieille que le Système solaire Découverte le 1er juillet 2025, la comète venue d'ailleurs qui se rapproche actuellement du Soleil aurait entre 7 et 14 milliards d'années, estime une équipe de chercheurs sur la base de sa vitesse ph...

La comète interstellaire 3I/ATLAS, probablement âgée de 7 milliards d’années, traverse notre système : une relique cosmique précieuse.
www.cieletespace.fr/actualites/l...
#Space #Astrophysics #Interstellar #Comet3I #CosmicFossil #CosmosAncient

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Original post on mastodon.social

La comète interstellaire 3I/ATLAS, probablement âgée de 7 milliards d’années, traverse notre système : une relique cosmique précieuse.
www.cieletespace.fr/actualites/la-comete-int...
#Space #Astrophysics #Interstellar #Comet3I […]

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Original post on infosec.exchange

#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 […]

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Comment observer la comète interstellaire 3I/Atlas ? Cet été, une comète interstellaire s’invite dans les constellations du Sagittaire et du Scorpion. Voici nos conseils pour la localiser et l’observer.

3I/ATLAS, visiteuse interstellaire, pourrait être la plus vieille comète jamais observée (7 milliards d’années !). À suivre.
www.cieletespace.fr/actualites/c...
#Space #Science #Innovation
#Astrophysics #Comet3I #Interstellar
#3IATLAS #AncientComet #SkywatchingEmerging

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