Carl Sagan, the visionary astrophysicist and science communicator, brought the wonders of the universe into the homes and hearts of millions. Born in 1934 in New York, Sagan’s fascination with the cosmos began at an early age, inspiring a lifetime of discovery and exploration. This biography explores his contributions to planetary science, his role in NASA’s Voyager missions, and his groundbreaking work as the host of the Cosmos series. Sagan’s ability to bridge science and humanity made him a beloved figure, while his advocacy for space exploration and environmental stewardship continues to inspire. This book provides a comprehensive look at his life, his scientific achievements, and his enduring legacy as one of the most influential thinkers of the 20th century.