Source:W.M. Keck Observatory News and Outreach
Artist's impression of an extrasolar planet.
Credit: ESO/L. Calçada.
Planet hunters using Keck Observatory have detected an extrasolar planet that is only four times the mass of Earth. The planet is the second smallest exoplanet ever discovered and adds to astronomers’ growing cadre of low mass planets called super-Earths. (read more)






