It’s the birthday of Carl Sagan, born in Brooklyn, New York in 1934, who did more to promote space exploration than almost any other single person. He died in 1996.
As a young astronomer advising NASA on a mission to send remote-controlled spacecrafts to Venus he learned that the spacecrafts would carry no cameras. Sagan couldn’t believe they would give up the chance to see an alien planet up close. It is largely thanks to him that cameras were used on later missions, giving us the first real photographs of planets.
Sagan also persuaded NASA engineers to turn the Voyager I spacecraft around on Valentine’s Day in 1990, so that it could take a picture of Earth from the very edge of our solar system, about 4 billion miles away. In the photograph, Earth appears as a tiny bluish speck. Sagan later titled one of his books “Pale Blue Dot,” impacted so greatly by this experience.
Carl Sagan, who created the TV show Cosmos, which is still the most popular science program every produced for television. He wrote a number of books, including “Pale Blue Dot,” “Contact”, and “Billions and Billions,” his last collection of essays, which came out in 1997, the year after he died.