“I'm often asked - and occasionally in an accusatory way - 'Are you atheist?' And it's like, 'You know, the only 'ist' I am is a scientist, all right?' I don't associate with movements. I'm not an 'ism.' I just - I think for myself.”

American astrophysicist and science communicator of the late 20th and early 21st centuries, he bridges complex cosmic concepts for broad audiences. His work on the Cosmos television series and public lectures makes astronomy accessible, while his writings and media appearances champion evidence-based reasoning and critical thinking.