How lightning on exoplanets could make it harder to find alien life

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How lightning on exoplanets could make it harder to find alien life
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Briley Lewis (she/her) is a freelance science writer and Ph.D. Candidate/NSF Fellow at the University of California, Los Angeles studying Astronomy & Astrophysics. Follow her on Twitter @briles_34 or visit her website www.briley-lewis.com.

We’re used to thunder and lightning here on Earth. But what might they be like on another planet? We know other worlds in the solar system have lightning strikes, for example, high in the clouds of Jupiter or during dust storms on Mars. Now, astronomers are thinking about lightning on planets beyond the solar system–and its effects on the signs of life on those planets.

What signs of life are astrobiologists looking for? A few particularly interesting chemicals for biology are ammonia, methane, ozone and nitrous oxide. Scientists don’t know of a way ammonia can be made without biological processes, and nitrous oxide is a common product of bacteria’s metabolisms.

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