NationMaster - Encyclopedia: Graphical timeline of the Big Bang

This timeline of the Big Bang shows the sequence of events as predicted by the Big Bang theory, from the beginning of the Planck Epoch to the end of the Epoch of Nucleosynthesis (and beginning of the Epoch of Galaxies). The scale is seconds expressed in powers of 10. For example, the Hadron Epoch extends from 10^-6 to 1 (or 10⁰) second and on the scale of the timeline spans -6 to 0. According to the Big Bang theory, the Universe originated in an extremely dense and hot state (bottom). ...

big bang: Definition and Much More From Answers.com (5680 words)
	In physical cosmology, the Big Bang is the scientific theory of the origin of the universe as an explosion of space and matter, starting from an enormously dense and hot state at some finite time in the past.
	Huge advances in Big Bang cosmology were made in the late 1990s and the early 21st century as a result of major advances in telescope technology in combination with large amounts of satellite data such as that from COBE, the Hubble space telescope and WMAP.
	The Big Bang theory predicted the existence of the cosmic microwave background radiation or CMB which is composed of photons emitted during baryogenesis.

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