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"Each interstellar comet brings a little bit of its history, its fossils, from elsewhere."
A dramatic breakup near the sun erased hopes of a bright comet lighting up the evening sky this week.
A comet from beyond our solar system is giving astronomers a rare look at how alien planetary systems may form under conditions very different from those that shaped our own cosmic...
We’re one comet down, and one to go for spring season 2026. We recently wrote about prospects for sungrazer C/2026 A1 MAPS and comet C/2025 R3 Pan-STARRS in April 2026. While the b...
The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.
By Ashley Strickland, CNN (CNN) — Astronomers using radio telescope observations to get an inside look at an interstellar comet have gleaned new insights into when and where the ce...
By Ashley Strickland, CNN (CNN) — Astronomers using radio telescope observations to get an inside look at an interstellar comet have gleaned new insights into when and where the ce...
Japan’s space agency, JAXA, has been knocking it out of the park with small-body exploration missions for decades. They had historic successes with both Hayabusa and Hayabusa2, and...
Earth has a group of cosmic stalkers. Known as “co-orbitals”, these small bits of rock have a 1:1 mean motion resonance with Earth. Basically, they take the exact same amount of ti...
If we're lucky, we'll soon have bright comets at both dawn and dusk. The post Dawn Comet C/2025 R3 (PanSTARRS) May Hold a Surprise appeared first on Sky & Telescope.
The most recent interstellar visitor was crisscrossing our galaxy for some 10 to 12 billion years before it came near the Sun. The post Interstellar Comet 3I/ATLAS Has Cold, Ancien...
Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically different from anything known to have ever formed around our...
Interstellar comet 3I/ATLAS is now on its way out of our solar system, never to return. The comet was only the third-ever detected object to originate from outside our solar system...
This celestial wanderer is only the third confirmed interstellar visitor and potentially the oldest
The Artemis II launch, and meteorites on Earth and the Moon.
Interstellar comet 3I/ATLAS was almost called 3I/Rubin, after researchers found that the giant survey telescope coincidentally spotted this visitor from the stars over a week befor...
Learn more about the interstellar traveler, Comet 3I/ATLAS, and what researchers know about its place of origin.
The interplanetary comet 3I/ATLAS is remarkably rich in a specific type of water that contains deuterium, meaning it came from somewhere colder and with lower levels of radiation t...
Learn how Comet C/2026 A1 (MAPS) disintegrated during its close solar pass, forming a “headless wonder,” and what this reveals about sungrazing comet breakups.
Amid a journey of celestial spectacles, the Artemis II astronauts may spot a comet—if it survives a dash past the sun
Earth has a group of cosmic stalkers. Known as "co-orbitals," these small bits of rock have a 1:1 mean motion resonance with Earth. Basically, they take the exact same amount of ti...
Japan's space agency, JAXA, has been knocking it out of the park with small-body exploration missions for decades. They had historic successes with both Hayabusa and Hayabusa2, and...
A new analysis of data obtained by JWST on 3I/ATLAS as it was on its way out of the Solar System (in December 2025) showed that its interior is rich in methane ice.
Spring meteor showers are back, though moonlight may dim one of the shows; astronomers watch a comet’s spin change in real time.
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