Alien

Science editor Alan Boyle’s Weblog: Astronomers say they have detected a planet just six and a half times as massive as Earth — at a distance so close its atmosphere could be studied, and with a density so low it’s almost certain to have water.

Earth – Atmosphere – Alan Boyle – Water – Environment

URL: http://cosmiclog.msnbc.msn.com/archive/2009/12/16/2152989.aspx