Astronomers had identified I Zwicky 18 as one of the youngest galaxies in the universe. But Hubble astronomers have discovered it is, in fact, much older and farther away from Earth than thought... Hubble has found fainter older red stars contained within the galaxy, suggesting its star formation started at least 1 billion years ago and possibly as much as 10 billion years ago... also suggests I Zwicky 18 is 59 million light-years from Earth, nearly 10 million light-years more distant than believed.