In the late 1970s, NASA declared 'no life on Mars' when the Viking landers failed to find organic molecules (but they did). So was that conclusion a mistake?
Astronomers have found new evidence that dying stars destroy their planets - with the closest planets at greatest risk - as the stars swell up into red giants.
The subsurface ocean on Enceladus is stable enough for life, a new study of data from the Cassini mission suggests. Heat flow at both poles provides the clues.
Astronomers have created the 1st 3D temperature map of a distant exoplanet. The planet, WASP-18b, is a scorching ultra-hot Jupiter 400 light-years away.
Astronomers have found the biggest and most distant black hole flare yet. It was likely caused by a massive star too close to a supermassive black hole.