To Find New Planets, Look for the Lithium?

Publication: National Geographic News   Date: November 11, 2009   View Article

Sunlike stars that harbor planets are low on lithium, according to a recent study that may offer a new tool in the hunt for planets beyond our solar system.

Stars are made almost entirely of hydrogen and helium. A small percentage of a star’s mass comes from heavier elements, which astronomers refer to as metals.

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