Saturday, October 11, 2008

2.7 Kelvin

Is the cosmic microwave background radiation warming the universe enough to keep certain phase transitions from happening? For example, is it why Pioneer isn't being constantly pelted by snowballs of solid hydrogen or helium, because 2.7 Kelvin is too warm for hydrogen or helium to freeze? Or why galaxies aren't all frozen into place in an infinite block of solid or liquid space?

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