"Look again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives... cherish the pale blue dot, the only home we've ever known.” ― Carl Sagan, 'Pale Blue Dot: A Vision of the Human Future in Space' Happy Earth Day folks! Pictured here: Atlantic Ocean, Antarctica, looking west, as photographed from the Earth-orbital Apollo 4 (Spacecraft 017/Saturn 501) uncrewed space mission, as the third stage was orbiting Earth at an altitude of 8,628 nautical miles. Credit: NASA | c. Nov. 1967 #NASA #Earth #EarthDay #EarthDay2017