There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

Astronomers are gathering evidence of a massive hidden planet lurking beyond Neptune. Trump Cuts Millions After California ...

A mysterious "rogue planet" has been observed gobbling 6 billion tons of gas and dust a second — an unprecedented rate that blurs the line between planets and stars, astronomers said Thursday. Unlike ...

Astronomers have observed a planet that in some ways behaves more like a star — including a massive growth spurt unlike anything witnessed before in a free-floating planet. The rogue planet, which ...

A mysterious interstellar comet — just the third such object ever confirmed to have entered our solar system — streaked past Mars last week. A spacecraft in orbit around the red planet had a front-row ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

St George Mining has raised a staggering $72.5 million at 10 cents a share with $50m flowing from big institutions and $22.5m ...

Sacramento State’s planetarium coordinator Kyle Watters shares how he developed a passion for astronomy and what audiences can expect during the upcoming planetarium shows on Oct. 24-26.

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...