It's almost the same size as Earth, and it orbits in its star's "Goldilocks zone" -- where temperatures are not too hot, not too cold, and maybe just right for life.
MORE: http://www.npr.org/blogs/thetwo-way/2014/04/17/303806575/scientists-spot-a-planet-that-looks-like-earths-cousin
See also...
Milky Way may bear 100 million life-giving planets
http://www.sciencedaily.com/releases/2014/06/140609100725.htm
