#3iatlas — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #3iatlas, aggregated by home.social.
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2026-09-17 00:00:00 UTC (Delta: 2026-09-16)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.32 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 221 days🌎 Relative to Earth
- Distance (km): 1,753,018,513.71 km (+2,655,277.47 km)
- Distance (AU): 11.72 (+0.02)
- Light travel time: 1 h 37 min 27.44 s (+8.86 s) -
2026-09-16 00:00:00 UTC (Delta: 2026-09-15)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.32 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 222 days🌎 Relative to Earth
- Distance (km): 1,750,363,236.24 km (+2,673,794.86 km)
- Distance (AU): 11.70 (+0.02)
- Light travel time: 1 h 37 min 18.58 s (+8.92 s) -
2026-09-16 00:00:00 UTC (Delta: 2026-09-15)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.32 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 222 days🌎 Relative to Earth
- Distance (km): 1,750,363,236.24 km (+2,673,794.86 km)
- Distance (AU): 11.70 (+0.02)
- Light travel time: 1 h 37 min 18.58 s (+8.92 s) -
2026-09-16 00:00:00 UTC (Delta: 2026-09-15)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.32 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 222 days🌎 Relative to Earth
- Distance (km): 1,750,363,236.24 km (+2,673,794.86 km)
- Distance (AU): 11.70 (+0.02)
- Light travel time: 1 h 37 min 18.58 s (+8.92 s) -
2026-09-16 00:00:00 UTC (Delta: 2026-09-15)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.32 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 222 days🌎 Relative to Earth
- Distance (km): 1,750,363,236.24 km (+2,673,794.86 km)
- Distance (AU): 11.70 (+0.02)
- Light travel time: 1 h 37 min 18.58 s (+8.92 s) -
2026-09-16 00:00:00 UTC (Delta: 2026-09-15)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.32 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 222 days🌎 Relative to Earth
- Distance (km): 1,750,363,236.24 km (+2,673,794.86 km)
- Distance (AU): 11.70 (+0.02)
- Light travel time: 1 h 37 min 18.58 s (+8.92 s) -
2026-09-15 00:00:00 UTC (Delta: 2026-09-14)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.33 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 223 days🌎 Relative to Earth
- Distance (km): 1,747,689,441.38 km (+2,693,022.82 km)
- Distance (AU): 11.68 (+0.02)
- Light travel time: 1 h 37 min 9.66 s (+8.98 s) -
2026-09-15 00:00:00 UTC (Delta: 2026-09-14)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.33 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 223 days🌎 Relative to Earth
- Distance (km): 1,747,689,441.38 km (+2,693,022.82 km)
- Distance (AU): 11.68 (+0.02)
- Light travel time: 1 h 37 min 9.66 s (+8.98 s) -
2026-09-15 00:00:00 UTC (Delta: 2026-09-14)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.33 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 223 days🌎 Relative to Earth
- Distance (km): 1,747,689,441.38 km (+2,693,022.82 km)
- Distance (AU): 11.68 (+0.02)
- Light travel time: 1 h 37 min 9.66 s (+8.98 s) -
2026-09-15 00:00:00 UTC (Delta: 2026-09-14)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.33 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 223 days🌎 Relative to Earth
- Distance (km): 1,747,689,441.38 km (+2,693,022.82 km)
- Distance (AU): 11.68 (+0.02)
- Light travel time: 1 h 37 min 9.66 s (+8.98 s) -
2026-09-15 00:00:00 UTC (Delta: 2026-09-14)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.33 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 223 days🌎 Relative to Earth
- Distance (km): 1,747,689,441.38 km (+2,693,022.82 km)
- Distance (AU): 11.68 (+0.02)
- Light travel time: 1 h 37 min 9.66 s (+8.98 s) -
https://www.europesays.com/ie/688315/ Study: Interstellar Comet 3I/ATLAS Formed in Cold, Nitrogen-Rich Environment #3IATLAS #CarbonDioxide #CarbonMonoxide #comet #Éire #IE #InterstellarComet #InterstellarObject #Ion #Ireland #Methylidyne #MilkyWay #nitrogen #Science #SolarSystem #star #temperature #Water
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Weekly Update from the Open Journal of Astrophysics 13/06/2026
It’s Saturday again so it’s time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further three papers, bringing the number in Volume 9 (2026) to 122 and the total so far published by OJAp up to 570.
I will continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.
The first paper to report this week, published on Thursday 11th June, is “Dancing Streams In Merging Halos: Stellar Streams in a MW–LMC-like merger” by (all based in the USA): Sachi Weerasooriya (Carnegie Observatories), Tjitske Starkenburg (Northwestern U.), Emily C. Cunningham (Columbia U.) & Kathryn V. Johnston (Flatiron Institute). This article explores how galaxy mergers, like the Milky Way-Large Magellanic Cloud merger, significantly alter the properties and structures of stellar streams, challenging the recovery of their initial orbits. It is in the folder marked Astrophysics of Galaxies.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116730200889106529
The second paper for this week, also published on Thursday 11th June but in the folder Cosmology and Nongalactic Astrophysics is “X-SORTER (X-ray Survey Of meRging clusTErs in Redmapper): X-ray and Spectroscopic Characterization of 12 Optically Selected Galaxy Cluster Merger Candidates” by Christopher Hopp, David Wittman, Rodrigo Stancioli, Zhuoran Gao & Faik Bouhrik (UC Davis) and Scott Adler (Rochester), all based in the USA. The X-SORTER program identifies merging galaxy clusters to study dark matter interactions, using optical indicators and X-ray observations. This method efficiently identifies active clusters suitable for detailed dark matter studies.
The overlay for this one looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116730279994960097
The third and final paper of the week, published on Friday 12th June in the folder Earth and Planetary Astrophysics, is “JCMT Constraints on the Early-Time HCN and CO Emission and HCN Temporal Evolution of 3I/ATLAS” by Jason T. Hinkle (U. Illinois, USA) and 6 others based in the USA and Chile. This article presents observations of the third Interstellar Object, 3I/ATLAS, providing early sub-mm constraints on its activity. The findings suggest a steeper production rate slope than typical Solar System comets.
The overlay for this one is here:
The final, accepted version can be found on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116735805179724489
And that concludes this week’s update. It has been a slow week on the publishing front, but the main reason is that we have a big backlog of papers accepted but waiting for the authors to put their final versions on arXiv and we can’t do anything about that! I’ll do another update next Saturday.
#3IAtlas #arXiv250514792v2 #arXiv251202106v3 #arXiv260305596v4 #astrochemistry #AstrophysicsOfGalaxies #CO #cosmologicalSimulations #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #galaxyClusters #GalaxyHalos #galaxyMergers #HCN #HighEnergyAstrophysicalPhenomena #interstellarObjects #OpenAccess #OpenAccessPublishing #spectroscopy #StellarStreams #XSORTER -
3I/ATLAS: Observatory That First Spotted Exocomet Compares The 3 Interstellar Objects Ever To Enter Solar System
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3I/ATLAS: Observatory That First Spotted Exocomet Compares The 3 Interstellar Objects Ever To Enter Solar System
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3I/ATLAS: Observatory That First Spotted Exocomet Compares The 3 Interstellar Objects Ever To Enter Solar System
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3I/ATLAS: Observatory That First Spotted Exocomet Compares The 3 Interstellar Objects Ever To Enter Solar System
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3I/ATLAS: Observatory That First Spotted Exocomet Compares The 3 Interstellar Objects Ever To Enter Solar System
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have your mind blown by
the #RealScientists at #SkinwalkerRange, who show with complete transparency to us all how science should be done. they discover a possible #superconductor in a piece of ceramics with strange markings that is both repelling & drawing in, a magnet.. 🥶😵#GifsArtidote: what a relief after seeing those censored #NASA scientists bs about #3Iatlas last night. this is how i want to learn about scientific discoveries, mysterious orbs, lights, beings & #UAPs or 3I/atlases out there. just the truth about my reality, the whole truth, & nothing but the truth, so help my self 🏴
#mysteries #press #media #news #BreakingNews
https://youtube.com/playlist?list=PLob1mZcVWOajL43drsCYq6OQiuSgTQACo&
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We’re about to find many more interstellar interlopers
Named #3IATLAS, a rogue comet that arrived recently is the third interstellar object #astronomers have detected within our Solar System, following #1IOumuamua and #2IBorisov discovered in 2017 and 2019. Scientists think interstellar objects routinely transit among the planets, but #telescopes have only recently had the ability to find one. For example, the #telescope that discovered Oumuamua only came online in 2010.
https://arstechnica.com/features/2025/10/were-about-to-find-many-more-interstellar-interlopers-heres-how-to-visit-one/ -
We’re about to find many more interstellar interlopers
Named #3IATLAS, a rogue comet that arrived recently is the third interstellar object #astronomers have detected within our Solar System, following #1IOumuamua and #2IBorisov discovered in 2017 and 2019. Scientists think interstellar objects routinely transit among the planets, but #telescopes have only recently had the ability to find one. For example, the #telescope that discovered Oumuamua only came online in 2010.
https://arstechnica.com/features/2025/10/were-about-to-find-many-more-interstellar-interlopers-heres-how-to-visit-one/ -
We’re about to find many more interstellar interlopers
Named #3IATLAS, a rogue comet that arrived recently is the third interstellar object #astronomers have detected within our Solar System, following #1IOumuamua and #2IBorisov discovered in 2017 and 2019. Scientists think interstellar objects routinely transit among the planets, but #telescopes have only recently had the ability to find one. For example, the #telescope that discovered Oumuamua only came online in 2010.
https://arstechnica.com/features/2025/10/were-about-to-find-many-more-interstellar-interlopers-heres-how-to-visit-one/ -
We’re about to find many more interstellar interlopers
Named #3IATLAS, a rogue comet that arrived recently is the third interstellar object #astronomers have detected within our Solar System, following #1IOumuamua and #2IBorisov discovered in 2017 and 2019. Scientists think interstellar objects routinely transit among the planets, but #telescopes have only recently had the ability to find one. For example, the #telescope that discovered Oumuamua only came online in 2010.
https://arstechnica.com/features/2025/10/were-about-to-find-many-more-interstellar-interlopers-heres-how-to-visit-one/ -
We’re about to find many more interstellar interlopers
Named #3IATLAS, a rogue comet that arrived recently is the third interstellar object #astronomers have detected within our Solar System, following #1IOumuamua and #2IBorisov discovered in 2017 and 2019. Scientists think interstellar objects routinely transit among the planets, but #telescopes have only recently had the ability to find one. For example, the #telescope that discovered Oumuamua only came online in 2010.
https://arstechnica.com/features/2025/10/were-about-to-find-many-more-interstellar-interlopers-heres-how-to-visit-one/ -
Our Interstellar Visitor, #3IATLAS, Could Be As Old As Our Galaxy
According to a new study by an international team of #astrophysicists, several active missions could rendezvous with this object before it leaves the Solar System. Any of these #Spacecraft Could Explore 3I/ATLAS to Learn More About "Cosmic Noon" which took place roughly 2 to 3 billion years after the #BigBang, was characterized by the rapid formation of new stars and planetary systems.
https://www.universetoday.com/articles/a-spacecraft-could-explore-3iatlas-to-learn-more-about-cosmic-noon -
📸 3I/ATLAS – a new interstellar visitor
Discovered July 1 by the ATLAS telescope in Chile, 3I/ATLAS is the third known object from outside our Solar System, after ʻOumuamua and Borisov. This comet, seen by Gemini North in Hawai‘i, has a visible coma and a steeply hyperbolic orbit—it will not return. It’s approaching the Sun, just inside Mars' orbit, but poses no threat to Earth.
📅 July 17, 2025
📷 Gemini Observatory / NOIRLab / NSF / K. Meech -
📸 Interstellar Comet 3I/ATLAS
This rare visitor is only the third known object from beyond our Solar System. Currently approaching from Jupiter’s distance, it will pass inside Mars’ orbit in late October. Though it will not come near Earth, it offers a rare chance to study material from another star system.📅 APOD – July 7, 2025
📷 Credit: NASA, JPL-Caltech#APOD #NASA #Comet #3IATLAS #Interstellar #Space #Astronomy #SolarSystem #Mars #Jupiter #Astrophysics #OuterSpace #StellarSnap #Cosmos