View of the Moon with the Earth in the foreground: new measurements support the theory that the Moon is material ejected from the Earth's mantle.

NASA astronaut Don Pettit has snapped a striking shot of the super-bright comet racing past our planet for the first time in ...

Astronaut Don Pettit took this stunning photo of a nearby comet from the International Space Station ...

The newly discovered "blazar," which has a mass equal to 700 million suns, is the oldest of its kind ever seen and changes ...

New observational data from the James Webb Space Telescope and simulation models have confirmed a new type of planet unlike ...

So I grabbed my camera, ran outside, and looked up just as Mars was supposed to emerge from the Moon's curved horizon. Seen ...

Happy New Year, star seeds. As we burn what’s been and look forward to what will be, we do so under the light of the first ...