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 sun Astronomers ...

Comet C/2025 R3 is already drawing attention—and offers a rare chance to understand what separates an ordinary comet from a truly “great” one. Comet C/2025 R3 (PanSTARRS) hangs above Bietschhorn in ...

A newly discovered comet, C/2025 R3 (PanSTARRS), could be the brightest of its kind visible from Earth in 2026. The comet will make its closest approach to the sun on April 19 and its closest approach ...

Time to look up stargazers. There's another comet coming our way. A newly discovered comet, comet C/2025 R3 (PanSTARRS), which appears to have been traveling in the solar system since September, is ...

A brightening comet on a once-in-170,000 years visit to the inner solar system is becoming easier to find before sunrise — and Thursday, April 16, is an ideal time to see it before it gets too close ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Comet Pan-STARRS, also known as comet C/2025 R3 (Pan-STARRS) ...

For the first time, a comet may have been caught flipping its spin. Sometime between April and December 2017, comet 41P/Tuttle-Giacobini-Kresák apparently started twirling in the opposite direction, ...

Kerry Breen is a news editor at CBSNews.com. A graduate of New York University's Arthur L. Carter School of Journalism, she previously worked at NBC News' TODAY Digital. She covers current events, ...

Astronomers caught a comet in the act of reversing its spin. Using NASA’s Hubble Space Telescope, scientists noticed the never-before-seen behavior of Comet 41P/Tuttle-Giacobini-Kresák (41P to its ...

Perplexity today expanded its Comet browser to iOS, making its AI Comet Assistant available to iPhone users. The Comet browser for iOS has many of the same features as the Comet browser for the ...

In a stroke of luck, astronomers saw the comet C/2025 K1 (ATLAS) break into four or five fragments in November after it passed close to the sun. By Robin George Andrews Astronomers on Wednesday ...

A recently discovered comet is plunging toward a fateful encounter with the Sun, which will determine whether it puts on a spectacular showing during the daylight or if it completely disintegrates ...