Did a large, icy comet smash into Neptune two centuries ago? That's the picture that is emerging from the latest measurements of gases in the atmosphere of the giant blue planet. At a meeting this ...

The Neptune neighbor, missed until now, offers clues to how moons form and shows once again that space is more crowded than it seems. Eric Mack has been a CNET contributor since 2011. Eric and his ...

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A large asteroid-comet hybrid that orbits between Neptune and Jupiter is an intriguing oddball as far as cosmic rocks go. Chiron, as the strange centaur is called, is what astronomers call a minor ...

The brief, bright appearance of Comet C/2025 A6 (Lemmon) is rapidly drawing to a close, giving stargazers a final, narrow ...

The Rosetta space probe's "rubber ducky" comet seems likely to have emerged from a gentle kiss in the cold black of outer space. And the comet might have a secret to tell about Neptune. Astronomers ...

The icy visitor, which reached its closest point on October 21, is currently situated more than 63.3 million miles from Earth ...

Want to see the “green comet” tonight? It’s been in the news for all of 2023, but few people have been able to get eyes-on with the elusive C/2022 E3 (ZTF). However, you still have a chance to catch ...

CINCINNATI (WKRC) - The most famous comet of all time, Halley's Comet, is finally heading back towards the sun. It reached its aphelion on Dec. 8, this marks the furthest distance away from the sun in ...

They call it “the Behemoth.” Astronomers using NASA’s Hubble Space Telescope have discovered that a red dwarf star is boiling off the atmosphere of a Neptune-sized exoplanet, causing it to form an ...