Recent content by Qloop

For some reason this reminds me... the cooling off, by itself, would indicate that the universe itself was expanding. If the universe were not expanding, it never would have cooled.

The cosmic microwave background radiation (CMB) was emitted when the universe was filled with a plasma that cooled enough to shift from opaque to transparent. Roughly 3000K. Basically, space looked like the surface of the Sun before then; that "surface" is the temp where the plasma becomes...