Solar System
~4.6 — 4.54 BYA
Solar System
- Solar system forms: ~4.57 BYA
- A region of the Milky Way collapses into a protoplanetary disk.
- The Sun ignites at the center.
- Planets, moons, asteroids, and comets form from remaining material.
Earth
- Earth forms: ~4.54 BYA
Posted: Jun 21, 2026
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