BBC News: Astronomers may have found a way to identify those Sun-like stars most likely to harbour orbiting planets.
A survey of stars known to possess planets shows the vast majority to be severely depleted in lithium.
To date, scientists have detected just over 420 worlds circling other stars using a range of techniques.
Garik Israelian and colleagues tell the journal Nature that future planet hunts could be narrowed by going after stars with particular compositions.
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