A Flight Through the Universe, by the Sloan Digital Sky Survey

The Universe Look up in the sky. Everything you see, from the brightest star to the faintest galaxy, is part of the same universe. We can see things in the universe over fifteen billion light years away. A light-year is the distance light travels in one year - over 9.4 trillion (9,400,000,000,000) kilometers! That means we can see things that are over 142,000,000,000,000,000,000,000 kilometers away. The Biggest Stars in the Universe.mp4 The Most Distant Galaxy in the Universe So Far Birth of the Moon Alien Planets & Eyeball Earths: The Search for Habitable Planets File:690958main p1237a1-XDF-Hubble.jpg