Carl Sagan's son who became a novelist and television writer is Nick Sagan. Born Nicholas Julian Zapata Sagan in 1970, he followed his father into science fiction—but through storytelling rather than astronomy.
Nick Sagan wrote the science-fiction novels Idlewild (2003), Edenborn (2004), and Everfree (2006), which form a connected trilogy. His fiction often explores identity, technology, survival, and artificial environments, themes that fit naturally alongside his family's interest in science and the future.
He also built a career in television writing. His credits include episodes of Star Trek: The Next Generation and Star Trek: Voyager, where he later worked as a story editor. He also wrote for animated and genre programs and contributed to computer games.
A memorable detail from his childhood connects him directly to his father's scientific legacy: at age six, Nick's greeting, “Hello from the children of planet Earth,” was recorded for NASA's Voyager Golden Record. Dorion Sagan and Sasha Sagan are also Carl Sagan's children, but they are Nick's half-siblings, not the novelist and television writer described here.