Nuclear reactors in space may sound like something out of science fiction, but they are likely to prove important for ...

August’s full sturgeon moon is peaking this weekend, accompanied by meteor showers and shining planets. Here’s how to see the ...

See the epic view of the moon and Earth captured by the Orion spacecraft ahead of its outbound powered flyby. Credit: NASA / ...

SDO has roughly two 'eclipse seasons' per year, and is currently in its 31st since the mission launched. It begain on July 10 ...

The moon's unusually low path tonight is a direct result of its 18.6-year lunar cycle, known as a lunistice, a point when the moon's orbit tilts to its greatest angle relative to Earth's equator.

August's "sturgeon moon" will look largest after sunset thanks to "moon illusion," which makes the moon look larger when it's ...

On Feb. 24, NASA announced an official "all clear" on social media, reporting the impact probability had dropped to just 0.004% and that the asteroid is "expected to safely pass by Earth in 2032." ...