View Single Post
Chronos
#105
Feb29-12, 04:48 AM
Sci Advisor
PF Gold
Chronos's Avatar
P: 9,454
The observable universe ends abruptly 13.7 billion years ago. This 'boundary' is called the CMB, or surface of last scattering. There are no galaxies, stars, etc. lurking behind the CMB waiting to be discovered, and precious little spacetime. Only about 400,000 years separates the CMB from the Big Bang.