Big Bang

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The Big Bang model is that the universe begun in an extremely dense and hot condition and has expanded. The theory suggests, and measurements show, that the universe is still expanding today.[1]

Graphical timeline of the universe[change | change source]

Many things happened in the first second of the universe's life:

Cosmic microwave background radiationTimeline of the Big Bang#Matter domination: 70,000 yearsTimeline of the Big Bang#Recombination: 240,000-310,000 yearsBig Bang nucleosynthesisInflationary epochPlanck timeTimeline of the Big Bang#Dark AgesPhoton epochLepton epochHadron epochQuark epochElectroweak epochGrand unification epochThe Five Ages of the UniverseReionizationGraphical timeline of the Stelliferous EraBig BangPlanck epoch

References[change | change source]

  1. NASA. "Universe 101:Big Bang theory". Retrieved 2010-01-28.

More reading[change | change source]

  • Caleb, Weedon (2005). Big Bang: the most important scientific discovery of all time and why you need to know about it. Harper Perennial. ISBN 9780007152520.