The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...

The Geminid meteor shower put on a dazzling cosmic firework show when it peaked overnight on Dec. 13 as shards of the solar ...

New models suggest Uranus and Neptune may hold far more rock than expected, raising questions about how these distant planets formed.

Perihelion, the point in a planet’s orbit where it is closest to the Sun, is a fascinating phenomenon that shapes much of our ...

Comet Lemmon was discovered in January 2025 and made its closest approach to Earth in late October 2025. But by November 2025 ...

The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter ...

Looking for a sky event this week? Check out our full Sky This Week column. December 10: Spot Neptune With no Moon in the ...