From measuring the temperature of the radiation left over from the Big Bang, observable today as the cosmic microwave background, we infer that the Universe is just a few degrees above absolute zero: 2.725 K..
Originating when the universe was much denser and hotter than it is now, the starting temperature of the radiation that makes up the CMB is estimated to have been around 3,000 K (5,000\xb0 F/2,726u207.
Precise measurements of the CMB are critical to cosmology, since any proposed model of the universe must explain this radiation.
The CMB has a thermal black body spectrum at a temperature of 2.72548\xb10.00057 K..
From measuring the temperature of the radiation left over from the Big Bang, observable today as the cosmic microwave background, we infer that the Universe is just a few degrees above absolute zero: 2.725 K..
Whereas today's Universe is immersed in cosmic background radiation with a temperature of 2.
This is known as the cosmic microwave background (CMB) and it has a uniform temperature of 2.
Precise measurements of the CMB are critical to cosmology, since any proposed model of the universe must explain this radiation
The cosmic microwave background radiation is an emission of uniform, black body thermal energy coming from all parts of the sky
The cosmic microwave background was first predicted in 1948 by Ralph Alpher and Robert Herman
The cosmic microwave background radiation and the cosmological redshift-distance relation are together regarded as the best available evidence
The cosmic microwave background is polarized at the level of a few microkelvin. There are two types of polarization
This is based on the assumption of very high symmetry for the universe, called the cosmological principle, which is minimally stated as follows: the universe is isotropic and homogeneous, i
e there is no preferred direction or preferred position are form-invariant with respect to the isometries of those subspaces