Potentially habitable planet discovered

Astronomers have found a new, potentially habitable Earth-sized planet. It is one of two new planets discovered around the star Gliese 581, some 20 light years away.


"Our calculations indicate that the planet is between 3.1 and 4.3 Earth masses, has a circular 36.6-day orbit, and a radius estimated between 1.2 and 1.5 Earth radii," remarked co-author Paul Butler of Carnegie's Department of Terrestrial Magnetism.

Its semi-major axis?half the length through the long direction of its ell [...]

Full story at http://spacefellowship.com/news/art22735/potentially-habitable-planet-discovered.html