Carl Sagan was an American astronomer, astrophysicist, and science communicator, best known for popularizing science and inspiring curiosity about the universe. Born in 1934, he made major contributions to planetary science, especially the study of Venus, Mars, and Jupiter. Sagan was a key figure in NASA’s space missions, including the Voyager program, where he helped design the Golden Record — a message for potential extraterrestrial life. His TV series Cosmos: A Personal Voyage brought the wonders of science to millions worldwide. A passionate advocate for reason and wonder, Sagan reminded humanity that “we are made of star stuff.