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Interstellar

Interstellar Comet 3I/ATLAS Nears Closest Earth Flyby on Dec. 19: New X‑ray Views, UN Tracking, and What Scientists Know Now

Interstellar Comet 3I/ATLAS Nears Closest Earth Flyby on Dec. 19: New X‑ray Views, UN Tracking, and What Scientists Know Now

December 15, 2025 — A rare visitor from beyond our solar system is making its final, headline-worthy sweep through the inner neighborhood — and the countdown to its closest pass by Earth is nearly over. Interstellar comet 3I/ATLAS (also designated C/2025 N1 (ATLAS)) will
15 December 2025
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Comet 3I/ATLAS Today (Dec. 15, 2025): The Interstellar Visitor Turns Green Ahead of Its Dec. 19 Flyby

Comet 3I/ATLAS Today (Dec. 15, 2025): The Interstellar Visitor Turns Green Ahead of Its Dec. 19 Flyby

On December 15, 2025, the solar system’s most talked-about “visitor” is back in headlines for two very comet-like reasons: it’s brightening and it’s glowing green. The object is Comet 3I/ATLAS—often shortened to “3I/Atlas comet”—the third confirmed interstellar object ever found passing through our neighborhood, after 1I/ʻOumuamua (2017) and 2I/Borisov (2019). 
15 December 2025
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Comet 3I/ATLAS Update (Dec. 13, 2025): New Green Glow, First X‑Ray Views, and What’s Next for the Interstellar Visitor

Comet 3I/ATLAS Update (Dec. 13, 2025): New Green Glow, First X‑Ray Views, and What’s Next for the Interstellar Visitor

On December 13, 2025, Comet 3I/ATLAS—the third confirmed interstellar object ever found crossing our solar system—is back in the headlines as astronomers release fresh observations that deepen the mystery (and the science) of this rare cosmic flyby. It’s not just
13 December 2025
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Comet 3I/ATLAS Update (Dec. 12, 2025): First X‑Ray View, Green Glow, and How to Spot the Interstellar Visitor

Comet 3I/ATLAS Update (Dec. 12, 2025): First X‑Ray View, Green Glow, and How to Spot the Interstellar Visitor

On December 12, 2025, the rare interstellar comet 3I/ATLAS (also written 3I/Atlas) is back in headlines for two reasons: a newly released X‑ray view from ESA’s XMM‑Newton and fresh Gemini North telescope images showing the comet looking noticeably greener—all as the object heads toward its closest approach to
13 December 2025
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Interstellar Comet 3I/ATLAS on 18 November 2025: New Multi‑Tailed Image, NASA’s Big Reveal and a Planetary‑Defense Rehearsal

Comet 3I/ATLAS Today: NASA’s Big Image Reveal, ISRO’s New Data and How to Follow the Interstellar Visitor (Nov. 19, 2025)

On Wednesday, November 19, 2025, the interstellar comet 3I/ATLAS is center stage: NASA is set to unveil its sharpest images yet of this rare object, while ISRO scientists in India share fresh observations from their Mount Abu telescope. Here’s everything you need
19 November 2025
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