At the heart of many galaxies rages a violent inferno, powered either by an ultramassive black hole or a burst of stellar birth. Bothun Half of all the galaxies in the observable universe may have been overlooked for decades because they were too large and diffuse to be readily noticed. The Evolution of the Universe P. James E. Peebles, David N. Schramm, Edwin L. Turner and Richard G. Kron Cosmologists have pieced together much about how the universe as we know it grew from a fireball instants after the big bang. Yet unanswered questions remain. How fast the universe is expanding and what its diameter might be fundamentally limit cosmological theories.
New observations yield better estimates of both.
Its nature and quantity rule the fate of the universe. A Scientific Armada Tim Beardsley A guide to upcoming space missions. Inc. All rights reserved. No part of this issue may be reproduced by any mechanical, photographic or electronic process, or in the form of a phonographic recording, nor may it be stored in a retrieval system, transmitted or otherwise copied for public or private use without written permission of the publisher. Periodicals Publication Rate.