American Astronomical Society

NASA finds more Earth-like planets outside solar system

Earth has a few more near-twin planets outside our solar system, tantalizing possibilities in the search for extraterrestrial life.
     
Astronomers announced Tuesday that depending on definitions, they have confirmed three or four more planets that are about the same size as Earth and are in the not-too-hot, not-too-cold "Goldilocks Zone" for liquid water to form.