The late astrobiologist Carl Sagan eloquently referred to Earth, in the view from Saturn, as a "Pale Blue Dot."
"Look again at that dot. That's here. That's home. That's us," he wrote in his 1994 "Pale Blue Dot" book. "On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives."
Sagan is known for making the complexities of space and the universe accessible to ordinary people. As a consultant to NASA, he helped lead the US space … Read more