Kepler Mission (4)
Sites about the proposed mission designed to discover and characterize hundreds of Earth-size planets using a spacebased photometer.
Terrestrial Planet - Wikipedia
Article about terrestrial planets. Also know as a telluric planet or rocky planet, a terrestrial planet is a planet that is primarily composed of silicate rocks, are the planets located closest to the Sun, and are in some way, "Earth-like".
Follow along on an extraordinary journey that may answer the age-old question of whether there is life elsewhere in the universe. Learn about planet and star formation, the search for extra-solar planets, and where life can exist elsewhere in the universe.
Rocky Planet Search at Lick Observatory
Endeavoring to answer the question: Do other Earth-like planets exist? Learn about the construction of the Automated Planet Finder telescope atop Mount Hamilton.
Are We Not the Only Earth Out There? - Howstuffworks
In the relatively new science of planet hunting, no find is more prized than finding a planet like ours, one that could support life. Howstuffworks gives a brief over view of where other Earths might be found.