... An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . GALAXIES . ... Courtesy of William Baum, the Space Telescope Science Institute, and NASA.) . Return to An Ancient Universe . Introduction .. ...
... An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . MARTIAN METEORITE . ... Courtesy NASA Johnson Space Flight Center.) . Return to An Ancient Universe . Overview .. ...
... An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE ANDROMEDA GALAXY . The Andromeda Galaxy. ... Return to An Ancient Universe . Overview .. ...
... An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE PLEIADES STAR CLUSTER . ... Courtesy of the Space Telescope Science Institute Digital Sky Survey.) . Return to An Ancient Universe . Changes in Stars .. ...
... An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE HUBBLE DEEP FIELD . ... Return to An Ancient Universe . The Age of Light From the Most Distant Galaxies .. ...
... Sharing the Universe is based upon work supported by the Informal Education Division of the National Science Foundation under Grant no DRL-0638873. ...
... Sharing the Universe is based upon work supported by the Informal Education Division of the National Science Foundation under Grant no DRL-0638873. ...
... Sharing the Universe is based upon work supported by the Informal Education Division of the National Science Foundation under Grant no DRL-0638873. ...
... A Universe Without Supernovae . ... Without supernovae to disperse these elements, the universe as we know it couldn't exist. Exploring Orbits and Gravity . ...
... The claim: Origins of the universe, Earth, and life by other means than what scientific evidence shows. ... that provide plausible explanations for subjects such as dark energy, dark matter, origins of the universe and others ...