Looking for New Earths

Who on Earth today has looked out at the stars and failed to wonder if anyone was looking back? Richard Terrile of NASA's Jet Propulsion Laboratories tells how the Astronomical Studies for Extra-Solar Planetary Systems, or ASEPS, is searching for planetary systems. Instead of sending out spacecraft to visit nearby stars, scientists are observing the stars' behavior and analyzing the light they send to Earth. A slight "wobble" in the star's rotation indicates the possibility of a planetary system.

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[audio] .au file (2.1 Mb), .gsm file (0.5 Mb), .ra file (0.2 Mb)