Timeline of Universe's and Earth's History in Galactic Years
The following list assumes that 1 galactic year is approximately 225 million years.
| about 60 galactic years ago | Big Bang |
| about 59 galactic years ago | Birth of the Milky Way |
| 20 galactic years ago | Birth of the Sun |
| 16 galactic years ago | Oceans appear on Earth |
| 15 galactic years ago | Life begins on Earth |
| 14 galactic years ago | Prokaryotes appear |
| 13 galactic years ago | Bacteria appear |
| 10 galactic years ago | Stable continents appear |
| 7 galactic years ago | Eukaryotes appear |
| 4 galactic years ago | Multicellular organisms appear |
| 2.8 galactic years ago | Cambrian explosion |
| 1 galactic year ago | Permian–Triassic extinction event |
| 0.26 galactic year ago | Cretaceous–Paleogene extinction event |
| 0.001 galactic year ago | Appearance of modern humans |
| Present day | |
|---|---|
| 6 galactic years in the future | Sun's habitable zone moves outside of the Earth's orbit |
| 10 galactic years in the future | The Milky Way and Andromeda Galaxy begin to collide |
| 30 galactic years in the future | Sun ejects a planetary nebula, leaving behind a white dwarf |
Read more about this topic: Galactic Year
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