Both are evidence in favor of Big Bang Cosmology (BBC). Hubble Redshift is easy to explain with BBC, not so easy (but possible) with alternatives. The existence, isotropy, and spectrum of the cosmic microwave background radiation is also easy to explain with BBC; but impossible to explain with any alternative. It's why BBC went from minority viewpoint amongst cosmologists to (pretty much) universal acceptance in a couple of decades.
The redshift of the cosmic microwave background radiation
the weakness of cosmic back ground radiation as those radiation are left over of big bangs
The uniformity of cosmic radiation suggests that it originates from sources that are distributed evenly throughout the universe. This could point to sources such as distant galaxies, black holes, or other cosmic phenomena that emit radiation in all directions with similar intensity.
The evidence of cosmic microwave background radiation supports the Big Bang theory.
The cosmic background radiation is believed to be the remains of the radiation emitted by the Universe when it started to get transparent - when it had cooled down to a temperature of about 3000 kelvin.
The redshift of the cosmic microwave background radiation
Redshift: The only reasonable explanation for the redshift is that most galaxies are moving away from us.As for the cosmic background radiation and the chemical composition, both of these closely match what is expected from the models about the Big Bang.
The expansion of the Universe, as can be seen by the redshift of distant galaxies; also, the cosmic background radiation. Read the Wikipedia article on "Big Bang" for more details.
Olbers' paradox is resolved in the context of the expanding universe and the presence of cosmic microwave background radiation by understanding that the universe is not infinite in age or size. The expansion of the universe causes light from distant stars to redshift, making them fainter and cooler, and the cosmic microwave background radiation fills the universe with a uniform glow, accounting for the darkness of the night sky.
the weakness of cosmic back ground radiation as those radiation are left over of big bangs
Cosmic radiation External terrestrial and internal radiation
The three main pieces of evidence supporting the Big Bang theory are the cosmic microwave background radiation, the abundance of light elements in the universe, and the redshift of galaxies.
Natural background radiation
no
The big bang caused the background radiation.
The uniformity of cosmic radiation suggests that it originates from sources that are distributed evenly throughout the universe. This could point to sources such as distant galaxies, black holes, or other cosmic phenomena that emit radiation in all directions with similar intensity.
The evidence of cosmic microwave background radiation supports the Big Bang theory.