The most Earth-like planet yet has been discovered, scientists report in the journal Science.
The rocky planet, Kepler 186f, is close to the size of Earth and has the potential to hold liquid water, which is critical for life, the team says.
Nestled in the Milky Way, it is part of a five-planet system that orbits around a cool dwarf star.
It was spotted by the Kepler telescope, which has found nearly 1,000 new worlds since its launch in 2009.
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