Sir Patrick Moore (1923-2012) began presenting The Sky at Night in April 1957. Airing a new episode every month, the show continues to explore our solar system and beyond. It is the longest running science show on TV. Many famous people have appeared on The Sky at Night, among them: Harlow Shapley, Carl Sagan and Jocelyn Bell-Burnell. Many astronauts have also appeared, including Neil Armstrong and Buzz Aldrin. Recordings of most of the early episodes no longer exist.