#interstellar-objects — Public Fediverse posts

Scientists are discussing the possibility that 3I/Atlas could be 2–3 times as old as our solar system. For the first time, we have now discovered chemical traces from this era of our galaxy.
#JamesWebb #3IAtlas #InterstellarObjects #Space #SpaceExploration

Specifically, 3I/Atlas contains 30 times more heavy hydrogen than comets in our solar system. It must therefore have formed in an extremely cold environment outside our solar system.
#JamesWebb #3IAtlas #InterstellarObjects #Space #SpaceExploration

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.

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 12the 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.

A small synthesis of perihelion‑centered state changes across observational domains. #InterstellarObjects #Comets #Astrophysics #CitizenScience

https://doi.org/10.5281/zenodo.18437476

Noted:
3I/ATLAS behavior consistent with the previously published murmuration framework. https://doi.org/10.5281/zenodo.18420169 #InterstellarObjects #Astrophysics #3IATLAS #Oumuamua #SETI @Astrodon @seti-institute @Cosmology @astrodynamics

Are interstellar objects data or divine messengers? Explore how science, prophecy, and history converge with 3I/ATLAS and beyond. #Oumuamua #Borisov #3IATLAS #InterstellarObjects #CosmicMessengers #AstronomyAndSpirituality #AncientWisdom #ISO5 #BetterLiving
https://spiritulality.stayingalive.in/inspiring-harmony/karmic-messaging-or-scienti.html

We Could Hitch a Ride to Unknown Frontiers on Super-Fast Interstellar Objects Like 3I/ATLAS
https://atlas.whatip.xyz/post.php?slug=we-could-hitch-a-ride-to-unknown-frontiers-on-super-fast-interstellar-objects-like-3iatlas
"Ride the Interstellar Wave: Journey to Unknown Realms with 3I/ATLAS"
#spaceexploration #interstellarobjects #cosmicjourney

3I/ATLAS Update: ESA's Juice Probe Captures Hyperactive 7 Billion Year Old Alien Visitor
https://atlas.whatip.xyz/post.php?slug=3iatlas-update-esas-juice-probe-captures-hyperactive-7-billion-year-old-alien-visitor
"Unveiling the Cosmic Enigma: ESA's JUICE Probe Captures Ancient Alien Visitor"
#spaceexploration #interstellarobjects #cosmicencounter

'They're Already Here': Uri Geller Claims NASA Is Hiding Alien Bodies Linked to 3I/ATLAS
https://atlas.whatip.xyz/post.php?slug=theyre-already-here-uri-geller-claims-nasa-is-hiding-alien-bodies-linked-to-3iatlas
"Unveiling Cosmic Secrets: The Curious Case of 3I/ATLAS"
#space #astronomy #aliens #interstellarobjects

'They're Already Here': Uri Geller Claims NASA Is Hiding Alien Bodies Linked to 3I/ATLAS
https://atlas.whatip.xyz/post.php?slug=theyre-already-here-uri-geller-claims-nasa-is-hiding-alien-bodies-linked-to-3iatlas
"Unveiling Cosmic Secrets: The Curious Case of 3I/ATLAS"
#space #astronomy #aliens #interstellarobjects

Uri Geller claims 3I/ATLAS aliens 'already on Earth' linked to NASA bodies
https://atlas.whatip.xyz/post.php?slug=uri-geller-claims-3iatlas-aliens-already-on-earth-linked-to-nasa-bodies
"Unveiling the Cosmic Connection: 3I/ATLAS Hub - Where NASA Meets Aliens!"
#spaceexploration #astronomycommunity #interstellarobjects

How the buzz over an ‘alien’ interstellar comet went viral
Is an interstellar spacecraft zooming through our solar system? That’s the big question for fans of unidentified flying objects — and for a researcher at the University of Washington who analyzed the speculation over the interstellar com
https://cosmiclog.com/2025/12/06/how-the-buzz-over-an-alien-interstellar-comet-went-viral/
#GeekWire #3IATLAS #A11pl3Z #Aliens #InterstellarObjects #SocialMedia #Space #UniversityOfWashington

How the buzz over an ‘alien’ interstellar comet went viral
Is an interstellar spacecraft zooming through our solar system? That’s the big question for fans of unidentified flying objects — and for a researcher at the University of Washington who analyzed the speculation over the interstellar com
https://cosmiclog.com/2025/12/06/how-the-buzz-over-an-alien-interstellar-comet-went-viral/
#GeekWire #3IATLAS #A11pl3Z #Aliens #InterstellarObjects #SocialMedia #Space #UniversityOfWashington

Astrophysicist’s latest 3I/ATLAS theory: It’s interested in Jupiter - Yahoo
https://atlas.whatip.xyz/post.php?slug=astrophysicists-latest-3iatlas-theory-its-interested-in-jupiter-yahoo
"Journey to Jupiter: Unveiling the Cosmic Connection of Interstellar Comet 3I/ATLAS" #SpaceMystery
#space #astronomy #jupiter #interstellarobjects

Astrophysicist’s latest 3I/ATLAS theory: It’s interested in Jupiter
https://atlas.whatip.xyz/post.php?slug=astrophysicists-latest-3iatlas-theory-its-interested-in-jupiter
"Unveiling the Cosmic Dance: 3I/ATLAS and Jupiter's Intriguing Encounter"
#space #astronomy #astrophysicist #interstellarobjects

Never-before-seen NASA images of comet 3I/ATLAS are coming on Wednesday (Nov. 19)
https://atlas.whatip.xyz/post.php?slug=never-before-seen-nasa-images-of-comet-3iatlas-are-coming-on-wednesday-nov-19
"Unveil the Mystery: NASA's Exclusive Images of Comet 3I/ATLAS Coming Soon! 🌌 #SpaceReveal"
#space #astronomy #nasa #comet3iatlas #interstellarobjects

Is it aliens? Here's why that's the least important question about 3I/ATLAS.
https://atlas.whatip.xyz/post.php?slug=is-it-aliens-heres-why-thats-the-least-important-question-about-3iatlas
"Beyond Aliens: Unveiling the Secrets of 3I/ATLAS"
#space #astronomy #interstellarobjects #scientificinquiry

Is this the real image of interstellar comet 3I/ATLAS? A viral post claims Japan’s space agency captured it |

A mysterious image circulating online has renewed worldwide fascination with the…
#Japan #JP #JapanNews #3I/ATLASimageverification #cometdiscovery #interstellarcomet3I/ATLAS #interstellarobjects #Japanesespaceagency #nasa #news #spectraldataanalysis
https://www.alojapan.com/1409192/is-this-the-real-image-of-interstellar-comet-3i-atlas-a-viral-post-claims-japans-space-agency-captured-it/

Do Interstellar Objects Pose A Threat To Earth?
https://atlas.whatip.xyz/post.php?slug=do-interstellar-objects-pose-a-threat-to-earth
"Exploring the Cosmic Dance: Interstellar Objects and Earth's Fate"
#space #astronomy #interstellarobjects #earthssafety

https://www.alojapan.com/1409192/is-this-the-real-image-of-interstellar-comet-3i-atlas-a-viral-post-claims-japans-space-agency-captured-it/ Is this the real image of interstellar comet 3I/ATLAS? A viral post claims Japan’s space agency captured it | #3I/ATLASImageVerification #CometDiscovery #InterstellarComet3I/ATLAS #InterstellarObjects #Japan #JapanNews #JapaneseSpaceAgency #nasa #news #SpectralDataAnalysis A mysterious image circulating online has renewed worldwide fascination with the interstellar comet 3I/ATLAS, one of the universe’s rarest celestial visitors. The image, al

Scientist hits out at NASA ‘pretending to be the adults in the room’ over potentially 'hostile alien threat'
https://atlas.whatip.xyz/post.php?slug=scientist-hits-out-at-nasa-pretending-to-be-the-adults-in-the-room-over-potentially-hostile-alien-threat
"Unveiling the Universe: Exploring Interstellar Mysteries and Alien Threats with Abi Loeb"
#space #astronomy #interstellarobjects #alienthreats

NASA is sitting on high-resolution 3I/ATLAS images: Avi Loeb | Elizabeth Vargas Reports
https://atlas.whatip.xyz/post.php?slug=nasa-is-sitting-on-high-resolution-3iatlas-images-avi-loeb-elizabeth-vargas-reports
Renowned Harvard astrophysicist Avi Loeb is making waves in the realm of space exploration by calling on
#spaceexploration #astrophysics #interstellarobjects

Brian Cox issues defiant response after expert warned us to 'brace ourselves' for mystery 'alien spaceship'
https://atlas.whatip.xyz/post.php?slug=brian-cox-issues-defiant-response-after-expert-warned-us-to-brace-ourselves-for-mystery-alien-spaceship
"Defy the Hype: Brian Cox's Take on the Alien Spaceship Stir"
#space #astronomy #interstellarobjects #alienspacecraft

Third Interstellar Object Discovered

https://minorplanetcenter.net/mpec/K25/K25N12.html

#HackerNews #InterstellarObjects #Discovery #Astronomy #SpaceExploration #ScienceNews

Third Interstellar Object Discovered

https://minorplanetcenter.net/mpec/K25/K25N12.html

#HackerNews #InterstellarObjects #Discovery #Astronomy #SpaceExploration #ScienceNews

Scientists suspect they’ve found a third interstellar object
Astronomers say they've spotted what appears to be only the third interstellar object to be detected flying through our solar system. The object, known as A11pl3Z, was discovered on July 1 by the Asteroid Terrestrial-impact Last Alert System, or ATLAS. Don't panic: This object has no
https://cosmiclog.com/2025/07/02/scientists-suspect-theyve-found-a-third-interstellar-object/
#CosmicSpace #A11pl3Z #InterstellarObjects #Space

Scientists suspect they’ve found a third interstellar object
Astronomers say they've spotted what appears to be only the third interstellar object to be detected flying through our solar system. The object, known as A11pl3Z, was discovered on July 1 by the Asteroid Terrestrial-impact Last Alert System, or ATLAS. Don't panic: This object has no
https://cosmiclog.com/2025/07/02/scientists-suspect-theyve-found-a-third-interstellar-object/
#CosmicSpace #A11pl3Z #InterstellarObjects #Space

🎙️ ✨ A new episode has been published on @ITSPmagazine

Show: Stories From Space With Matthew S Williams

Episode: Rendezvousing with an Interstellar Object | A Conversation with Dr. Alan Stern

Podcast format: Audio

#InterstellarObjects #SolarSystem #space

Enjoy!

👉 https://itsprad.io/storiesfromspace-69

To learn more about this host and podcast, visit the page here
👇
https://www.itspmagazine.com/itspmagazine-podcast-radio-hosts/matthew-s-williams

🎙️ ✨ A new episode has been published on @ITSPmagazine

Show: Stories From Space With Matthew S Williams

Episode: Rendezvousing with an Interstellar Object | A Conversation with Dr. Alan Stern

Podcast format: Audio

#InterstellarObjects #SolarSystem #space

Enjoy!

👉 https://itsprad.io/storiesfromspace-69

To learn more about this host and podcast, visit the page here
👇
https://www.itspmagazine.com/itspmagazine-podcast-radio-hosts/matthew-s-williams

Why interstellar objects like ‘Oumuamua and Borisov may hold clues to exoplanets

https://arstechnica.com/science/2024/02/why-interstellar-objects-like-oumuamua-and-borisov-may-hold-clues-to-exoplanets/

#ArsTechnica #InterstellarObjects #Astronomy #Space

Why interstellar objects like ‘Oumuamua and Borisov may hold clues to exoplanets

https://arstechnica.com/science/2024/02/why-interstellar-objects-like-oumuamua-and-borisov-may-hold-clues-to-exoplanets/

#ArsTechnica #InterstellarObjects #Astronomy #Space

Hmmm.... 🙂

"In this paper, we show that missions to interstellar objects can be performed with existing or near-term technology, demonstrating that different categories of missions to different types of interstellar objects are feasible within the next decade."

https://arxiv.org/abs/2008.07647

#Space #InterstellarObjects

@readsteven

Study: ‘Oumuamua interstellar object might be remnant of a “super-Earth” - Enlarge / An artist's impression of 'Oumuamua. A new study based on computer simulations offers a c... more: https://arstechnica.com/?p=1668056 #interstellarobjects #itisntaliens #‘oumuamua #astronomy #science #physics