SpaceCassini's Grand Finale: The spacecraft that unveiled Saturn From magical rings to loony moons to giant polar hurricanes, in 13 years orbiting Saturn the Cassini probe has exposed many wonders. Here's our pick Features
SpaceSome TRAPPIST-1 planets may have the right conditions for water Water on the planets nearest the TRAPPIST-1 star would be destroyed by UV radiation but it could survive on the cooler worlds in the habitable zone 51¶¯Âþ