Tests of Big Bang Cosmology
http://edu-observatory.org/olli/tobbc/Week4.html   or   index.html

Tests of Big Bang Cosmology

  The Big Bang Model is supported by a number of important
  observations, each of which are described in more detail
  on separate pages:

  1. The expansion of the universe

  Edwin Hubble's 1929 observation that galaxies were generally
  receding from us provided the first clue that the Big Bang
  theory might be right.

  2. The abundance of the light elements H, He, Li

  The Big Bang theory predicts that these light elements should
  have been fused from protons and neutrons in the first few
  minutes after the Big Bang.

  3. The cosmic microwave background (CMB) radiation

  The early universe should have been very hot. The cosmic
  microwave background radiation is the remnant heat leftover
  from the Big Bang.

  These three measurable signatures strongly support the notion
  that the universe evolved from a dense, nearly featureless
  hot gas, just as the Big Bang model predicts.

Atmospheric Trasmission

LaGrangian Points

NOVA: Origins: Back to the Beginning (50 min)
  http://video.pbs.org/video/1855438915/  Start 2:45

M16: Pillars of Creation