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SpaceX has moved its newest Starship spacecraft to the launch pad for testing ahead of the megarocket's upcoming 11th test flight.

Alien objects may be seeding the universe. Here's what that means.

A new study suggests that a group of cells, key for the health of blood and the immune system, are vulnerable to aging-like processes after spending time on the ISS.

"It's been fantastic to watch 'Foundation' become such a global phenomenon, with fans tuning in from every corner of the world."

The moon is near new phase this week, and clearer skies and cooler overnight temperatures means that this is also an optimum week to check out the beautiful summer Milky Way.

Watch live as a potentially hazardous asteroid makes a close flyby of Earth on Sept. 18.

See breathtaking images of September's blood moon total lunar eclipse from Egypt.

Climate models are complex, just like the world they mirror.

NASA plans to send the ISS into Earth's atmosphere in 2030, and it has no plans for a replacement — at least, not directly.

On Sept. 17, 1789, the British astronomer William Herschel discovered Saturn's "Death Star" moon, Mimas.