'Most Earth-like planet yet' spotted by Kepler
18 April 2014 Last updated at 04:39 BST
The most Earth-like planet yet has been discovered, scientists report in the journal Science.
The rocky planet, dubbed Kepler 186f, is close to the size of Earth.
At about 10% bigger scientists say it may well have liquid water - a key ingredient for life - on its surface.
Tim Allman reports.