Vladimir Mayakovsky wrote a poem about it, including the following line: “Every proletarian should see the Planetarium!” The ...

Hale-Bopp originated in the Oort Cloud, a theoretical shell of icy planetesimals surrounding the sun in the outer reaches of ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the ...

CHABOT: So, in planetary science ... Here I'm gonna make a model of the solar system. This rock is my sun, and I'm gonna place it right there, and an inch away, I'm gonna place the Earth.

Surface features of Uranus' icy moon Miranda point to the existence of a once deep ocean, one that still may exist today.

“It could completely reshape our understanding of the solar system and of other planetary systems ... However, Lykawka pointed out, his model does not look at the same orbital alignments ...

“To find evidence of an ocean inside a small object like Miranda is incredibly surprising,” said Tom Nordheim, a planetary ...

For nearly 40 years, scientists have generally agreed that Earth's Moon formed from debris after a massive collision with our ...

An asteroid named for the ancient Egyptian god of darkness and disorder may not pose a hazard to Earth, but that does not ...

By 3.6 billion years ago, Mars should have become too cold for liquid water, but something kept the rivers flowing.