How spectroscopy could reveal alien life

Garik Israelian is a spectroscopist, studying the spectrum emitted by a star to figure out what it's made of and how it might behave.  It's a rare and accessible look at this discipline, which may be coming close to finding a planet friendly to life.

Garik Israelian's stargazing on the Canary Islands has led to high-profile discoveries about space's big disasters -- including the first evidence that supernova explosions make black holes.

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