Though his measurements for the sun were twenty times too small, they still revealed the sun to be enormously larger than the earth. In fact, the size difference was so great that Aristarchus concluded that the sun, not the earth, occupied the center of the universe. Aristarchus also determined that the stars must be at least many millions of miles away. He based this determination on his total inability to observe parallaxesb for any of the stars. In short, Aristarchus established a remarkably