Astronomy Cast Ep. 34: Discovering Another Earth

The 365 Days of Astronomy

http://www.astronomycast.com/archive/

From April 29, 2007.

What a week! Astronomers announced the discovery of an Earth-sized planet orbiting the nearby star Gliese 581! We talk about the technique used to discover the planet, the possibilities of finding even smaller planets, and what the future holds for finding another Earth.

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