The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Learn about the new perspective on Earth's reduction of moderately volatile elements, a discovery made possible by meteorites ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

This provides another piece of the puzzle to understand how planets and ... New studies offer a clearer picture of how the outer solar system formed and evolved based on analyses of trans ...