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Comets News 9 December 2025 - 16 December 2025

Comet 3I/ATLAS Today (Dec. 16, 2025): Interstellar Visitor Nears Closest Approach to Earth on Dec. 19

Comet 3I/ATLAS Today (Dec. 16, 2025): Interstellar Visitor Nears Closest Approach to Earth on Dec. 19

As of Tuesday, December 16, 2025, the interstellar comet known as 3I/ATLAS—a rare visitor from beyond our solar system—is drawing intense attention ahead of its closest approach to Earth on Friday, Dec. 19. Despite dramatic headlines and online rumors, reputable agencies are consistent on the key point: 3I/ATLAS poses no threat to Earth, and will remain about 1.8 astronomical units (AU) away—roughly 170 million miles (270 million kilometers). NASA Science+1 Below is what’s happening today, what scientists know, what observers can realistically expect to see, and why this fleeting flyby matters for space science. What’s new today: Dec. 16 coverage focuses on the flyby, safety, and a narrow
16 December 2025
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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 reach its closest approach to Earth on Friday, December 19, 2025, staying a safe ~1.8 astronomical units away — about 270 million kilometers (167–170 million miles), roughly twice the average Earth–Sun distance. It poses no threat to Earth, but the timing is ideal for professional observatories — and for skilled backyard stargazers with telescopes — to squeeze out precious data before the comet continues outward on
15 December 2025
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Night Sky Tonight (Dec. 15, 2025): Geminids Encore, Orion Nebula Peak, and a Rare Interstellar Comet Turns Green

Night Sky Tonight (Dec. 15, 2025): Geminids Encore, Orion Nebula Peak, and a Rare Interstellar Comet Turns Green

December 15, 2025 brings a near-perfect recipe for skywatchers: long winter nights, a slim waning Moon, and a sky full of headline-worthy targets—plus a rare interstellar visitor that’s suddenly glowing green in new images. With the winter solstice now just days away, the Northern Hemisphere is sliding toward the longest night of the year, while the Southern Hemisphere moves toward summer’s shorter nights. Either way, tonight’s sky has something for everyone, from casual stargazers stepping outside for five minutes to telescope owners planning a pre-dawn session. The Guardian Below is a news-style roundup of what’s trending today (15.12.2025)—followed by a practical “what to see tonight” guide you can use anywhere
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). Space+1 Today’s coverage is focusing on what observers are seeing now that 3I/ATLAS has re-emerged for sustained viewing after its late-October solar passage: a more active coma, a greener tint, and renewed discussion of a quirky-looking feature known as an anti-tail. The Times of India+2Digit+2 With the comet set to make its closest approach to Earth on December 19—still a very safe ~270 million kilometers
15 December 2025
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Comet 3I/ATLAS: Green-Glowing Interstellar Visitor Nears Its Closest Earth Pass on Dec. 19, 2025

Comet 3I/ATLAS: Green-Glowing Interstellar Visitor Nears Its Closest Earth Pass on Dec. 19, 2025

Updated: December 14, 2025 A rare messenger from another star system is sliding through our solar system right now—and it’s putting on a subtle but scientifically rich show. Comet 3I/ATLAS (also designated C/2025 N1 (ATLAS)) is only the third confirmed interstellar object ever observed inside our solar system. Over the last several days, fresh reporting and new datasets have sharpened the picture: the comet’s coma has taken on a faint green glow, and X-ray observatories are now seeing the interaction between its escaping gases and the solar wind—an unusual multiwavelength campaign that’s turning 3I/ATLAS into one of the most intensively monitored comets of 2025. NASA Science+2European Space Agency+2 Most
14 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 “another comet”: 3I/ATLAS is an outsider from beyond the Sun’s gravitational family, racing through on a hyperbolic path that proves it wasn’t born here. NASA Science+1 Today’s developments add two eye-catching chapters to the story: All this arrives just days before the comet’s closest approach to Earth on December 19, 2025—a safe but scientifically valuable alignment that researchers are treating
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 Earth on December 19(still very far away, and not a threat). NASA Science+3European Space Agency+3Phys.org+3 What’s new today: 3I/ATLAS shines in X‑rays and shifts greener in visible light Today’s (12/12/2025) coverage converges on a simple theme: as 3I/ATLAS moves away from the Sun, scientists are catching it in more wavelengths—and the comet’s behavior is evolving quickly enough to be visible even in week‑to‑week comparisons. Today’s
13 December 2025
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Interstellar Comet 3I/ATLAS Lights Up December Skies: X‑Ray Glow, Life‑Building Molecules and How to Watch the December 19 Flyby

Interstellar Comet 3I/ATLAS Lights Up December Skies: X‑Ray Glow, Life‑Building Molecules and How to Watch the December 19 Flyby

As of 11 December 2025, interstellar comet 3I/ATLAS has turned into the most closely watched object in the night sky — and not just by astronomers. In the last few days we’ve had: At the same time, a swirl of headlines about “World War I chemical weapons” and “alien probes” is competing with the science. Here’s a clear, news-style rundown of what we actually know today. What is interstellar comet 3I/ATLAS? 3I/ATLAS is only the third known interstellar object to sweep through our Solar System, after 1I/ʻOumuamua (2017) and 2I/Borisov (2019). NASA classifies it as interstellar because its orbit is
11 December 2025
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NASA’s Interstellar Comet 3I/ATLAS: New Images, Life’s Ingredients and What Comes Next After the December Flyby

NASA’s Interstellar Comet 3I/ATLAS: New Images, Life’s Ingredients and What Comes Next After the December Flyby

As of December 10, 2025, NASA and partner observatories are racing to squeeze every last photon out of interstellar comet 3I/ATLAS — a green-glowing, ice‑volcano‑blasting visitor loaded with the chemical “ingredients for life.” Here’s the latest on what we’ve learned and what to watch in the days ahead. What is 3I/ATLAS, and why is it such a big deal? 3I/ATLAS — also cataloged as C/2025 N1 (ATLAS) — is only the third confirmed object ever seen passing through our solar system from another star system, after 1I/ʻOumuamua in 2017 and 2I/Borisov in 2019.NASA Science+1 It was discovered on July 1,
10 December 2025
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Interstellar Comet 3I/ATLAS Glows in X-Rays and Life‑Building Molecules as Earth Flyby Nearby

Interstellar Comet 3I/ATLAS Glows in X-Rays and Life‑Building Molecules as Earth Flyby Nearby

As of December 10, 2025, a rare interstellar comet is putting on a quiet but scientifically spectacular show across the solar system — from X‑rays to organic chemistry. A Once‑in‑a‑Lifetime Visitor From Another Star Interstellar comet 3I/ATLAS , also cataloged as C/2025 N1, is only the third confirmed interstellar object ever seen passing through our solar system, after 1I/ʻOumuamua and 2I/Borisov.xrism.jaxa.jp+ 1 Discovered on July 1, 2025 by the NASA‑funded Asteroid Terrestrial‑impact Last Alert System (ATLAS) telescope in Chile, the comet’s hyperbolic trajectory and high speed show that it is not bound to the Sun’s gravity ; once it leaves,
10 December 2025
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Interstellar Comet 3I/ATLAS Nears December 19 Flyby: New Hubble Photos, First X‑Rays and How to See It Today

Interstellar Comet 3I/ATLAS Nears December 19 Flyby: New Hubble Photos, First X‑Rays and How to See It Today

On December 9, 2025, interstellar comet 3I/ATLAS (also known as C/2025 N1 (ATLAS)) is racing through the inner solar system, just 10 days away from its closest approach to Earth. Today’s wave of new images and data — from Hubble, ESA’s JUICE spacecraft, Japan’s XRISM X‑ray observatory, ALMA, and both professional and amateur telescopes — is turning this icy visitor into one of the most studied comets in history. Chron+3NASA Science+3European Space Agency+3 Below is a roundup of what’s new today, why 3I/ATLAS matters, and what skywatchers can realistically expect to see. Today’s Big 3I/ATLAS Updates (December 9, 2025) 1. The comet’s current distance, speed and brightness A detailed science roundup published
9 December 2025
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Interstellar Comet 3I/ATLAS Today (December 8, 2025): Latest NASA Images, ‘Serial Killer’ Debate and How to See the Visitor from Another Star

Interstellar Comet 3I/ATLAS Today (December 8, 2025): Latest NASA Images, ‘Serial Killer’ Debate and How to See the Visitor from Another Star

On December 8, 2025, interstellar comet 3I/ATLAS is racing through the inner solar system, past the Sun and on its way to a safe but scientifically thrilling flyby of Earth on December 19. In the last 24–48 hours, new Hubble photos, Mars-orbiter results, and a fresh analysis from a Harvard astrophysicist have pushed this icy visitor back into the headlines. Live Science+2FOX Weather+2 Here’s a deep, news-ready look at what 3I/ATLAS is, what’s new today, and how skywatchers can try to catch it before it disappears back into interstellar space. What is Comet 3I/ATLAS? 3I/ATLAS — also cataloged as C/2025 N1 (ATLAS) — is the third confirmed interstellar
9 December 2025
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Stock Market Today

Wesfarmers share price: what to watch on ASX next week as results loom

Wesfarmers share price: what to watch on ASX next week as results loom

7 February 2026
Wesfarmers shares closed down 1.33% at A$85.04 on Friday, following a sharp drop in the S&P/ASX 200, which fell 2% for its steepest one-day loss in 10 months. Investors are watching for Australia’s household spending data next week and Wesfarmers’ half-year results due Feb. 19.
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