The U.K. Space Agency has decided to continue funding a project by Rolls-Royce to create a small nuclear-powered reactor that could serve as a long-term energy source for lunar bases.

On March 21, 1965, NASA launched the Ranger 9 spacecraft on a mission to crash into a lunar crater.

A stricken Surface Water and Ocean Topography (SWOT) instrument is back online, but NASA officials did not disclose a cause for the issue during commissioning.

A new method could allow astronomers to assess exoplanets' likely subsurface water stores, aiding the search for worlds capable of supporting life as we know it.

Even quiet red dwarfs are prone to extreme outbursts that put our sun to shame, with significant implications on the search for alien life.

A newfound, highly adaptable bacterium shows the kind of diverse life to look for on Europa or Enceladus, astronomers say.

Buying Guide The best telescopes for seeing stars, galaxies, nebulas, planets and more — featuring tabletop, astrophotography-friendly and computerized models.

Variety interviewed William Shatner for his new life-spanning documentary 'You Can Call Me Bill.'

On this episode of This Week in Space, Rod Pyle and Tariq Malik talk about seeing Earth from space and the Overview Effect with the term's creator Frank White.