If we can look back in time to almost 14 billion years, before the first galaxies were being assembled, then what is there to see?


We see the Cosmic Background Radiation, the afterglow of the Big Bang.  This light was released when the universe became transparent, when it was only about 300,000 years old.

COBE_dT.gif (389632 bytes)

The universe has now cooled to a temperature of 2.76 degrees Celsius above absolute zero!
The temperature variations shown are only a few 100 micro-degrees Celsius.
They mark the density fluctuations that will someday become galaxies
and clusters of galaxies.


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