New Worlds on the Horizon: Earth-Sized Planets Close to Other Stars

Details New Worlds on the Horizon: Earth-Sized Planets Close to Other Stars New Worlds on the Horizon: Earth-Sized Planets Close to Other Stars

2007-10-11

arxiv.org/abs/0710.2366v1

Astronomy and Astrophysics

Astrophysics

to appear in Science, October 12, 2007

Scientific paper

10.1126/science.1144358

The search for habitable planets like Earth around other stars fulfils an ancient imperative to understand our origins and place in the cosmos. The past decade has seen the discovery of hundreds of planets, but nearly all are gas giants like Jupiter and Saturn. Recent advances in instrumentation and new missions are extending searches to planets the size of the Earth, but closer to their host stars. There are several possible ways such planets could form, and future observations will soon test those theories. Many of these planets we discover may be quite unlike Earth in their surface temperature and composition, but their study will nonetheless inform us about the process of planet formation and the frequency of Earth-like planets around other stars.

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