Alarmed by Climate Change, Astronomers Train Their Sights on Earth

Peter Kalmus, a climate scientist at NASA’s Jet Propulsion Laboratory, began his career searching for gravitational waves in the universe.“I started feeling a lot of anxiety that I wasn’t committing my talents to doing something to stop global heating,” said Dr. Kalmus, who stressed that he spoke for only himself, not his employer. After a few years of research in astrophysics, he pivoted to studying the physics…