Live Chat: The Quest for Another Earth (Video)

See below for the chat box. Join us each Thursday at 3 p.m. EDT for a live conversation with leading scientists and expert reporters.
Today's Topic

Astronomers are finding hundreds of planets orbiting stars other than our sun, some of them not much bigger than Earth. It seems just a matter of time before scientists will find planets that are Earth's size. But when might we reasonably expect to discover "another Earth"? What will it take to find an Earth-like planet, and how will we tell if it could harbor life? For that matter, why all the excitement? What's the point to the centuries-long quest for life out there?

Join us on Thursday, 9 May, at 3 p.m. EDT on this page for a live Google Hangout when we address these questions. Be sure to leave your questions for our guests in the comment box below.

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Today's Guests

Sara Seager

Steven J. Dick


Richard Kerr

Submit your question to our guests in the comment box below