This is a timeline of geological and relevant astronomical events on Earth before the Cambrian period started. This covers 88% of the duration of the history of the Earth. The dates given are based on scientific evidence and where possible are calibrated from independent sources.
The earliest solar system
In the earliest solar system history, the sun, the planetesimals and the jovian planets were formed. The inner solar system aggregated slower than the outer, so the terrestrial planets were not yet formed, including Earth and Moon.