Department of Astronomy and Astrophysics University of Chicago
Recession of the galaxies: distant objects appear to be moving
away from us. Cosmic Microwave Background: we are bathed in
primordial light. The big bang or hot expanding model of
cosmology finds strong support from the recession of the
galaxies, that is, when we look out in the night sky, distant
objects appear to be flying away from us. And also the cosmic
microwave background - the fact that we are bathed in primordial
light that bears evidence from and earlier, hotter, and denser
period in the universe. As we shall see, this evidence also
supports the gravitational instability paradigm - the picture
that gravity can make wrinkles The relation between recession
and expansion is easy to Imagine you're standing at the north
pole and think boy, I'd much rather be at the basking the sun at
some equatorial paradise. You look up the distance to it and
plan your trip. Right before you leave, you think, I'd better
check the distance again. Unbeknownst