Neil deGrasse Tyson is a highly visible American astrophysicist, author, and science communicator known for his work in popularizing science, particularly astronomy. He's the director of the Hayden Planetarium, host of the popular radio show "StarTalk," and host of the television series "Cosmos: A Spacetime Odyssey". Tyson's career spans research, teaching, and public engagement, making him a prominent figure in science communication.