Search for Earth-like Planets in the Yahoo! Directory

The Search for Another Earth - PlanetQuest [read review]
Official NASA site for the PlanetQuest missions. Includes news of new planet discoveries, information on the latest extrasolar planet research, and a new worlds atlas.
planetquest.jpl.nasa.gov
Kepler Mission (3)
Sites about the proposed mission designed to discover and characterize hundreds of Earth-size planets using a spacebased photometer.
dir.yahoo.com/.../Search_for_Earth_like_Planets/Kepler_Mission
Terrestrial Planet Finder - JPL Planet Quest
The Terrestrial Planet Finder observatories will study all aspects of planets outside our solar system: from their formation and development in disks of dust and gas around newly forming stars to their suitability as abodes for life.
planetquest.jpl.nasa.gov/TPF/tpf_index.cfm
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".
en.wikipedia.org/wiki/Terrestrial_planet
Alien Earths
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.
www.alienearths.org
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.
exoplanets.org/rpf.html
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.
science.howstuffworks.com/other-earth.htm