Galaxies on Instagram: "The Pale Blue Dot photo was taken in 1990, when Voyager 1 was already more than 3.7 billion miles from Earth. At that distance our entire world appears as a tiny, almost invisible speck suspended in a beam of scattered sunlight. Carl Sagan used that image as a reminder of how small and fragile everything we know really is — every life, every war, every dream, every mistake playing out on a dust mote floating in a vast cosmic dark. His famous line captured the whole point