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Offbeat Astronomy

The Order of Events: Ethan Siegel's Cosmology Article Series

Before the big bang

The big bang event

Energy is converted into particles

The war between matter and anti-matter

Matter with mass forms

Subatomic particles form

The last anti-matter disappears

Atoms form

After atoms and before stars

Stars form

The first stars died

Polluted stars form

Galaxies form

Light starts traveling freely

Life becomes possible

Formation of Earth

Cosmic Web of galaxies forms

The age of peak star formation

Oxygen kills most life on Earth

Complex life forms form on Earth

Mammels appear on Earth

Modern humans appear on Earth



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