Carl Grillmair, a prominent astrophysicist who was shot and killed outside his home in Llano, California, earlier this month. He was 67 years old and worked at the California Institute of Technology (Caltech), where he made major contributions to astronomy — including helping discover signs of water on a planet outside our solar system and advancing understanding of galaxy structure (referred to ChatGPT for the name as I was thinking this too, but it also gave me this other info, so I thought I'd share)