Editing Timeline of the universe (section)

== Epochs of the formation of the Solar System ==
{{Main article|Formation and evolution of the Solar System}}

* 9.2 billion years (4.6–4.57 Gya): Primal supernova, possibly triggers the [[formation of The Solar System]].
* 9.2318 billion years (4.5682 Gya): [[Sun]] forms – Planetary nebula begins accretion of planets.
* 9.23283 billion years (4.56717–4.55717 Gya): Four [[Jovian planets]] ([[Jupiter]], [[Saturn]], [[Uranus]], [[Neptune]]<!--(and may be [[Planet Nine]] a.k.a Phattie -->) evolve around the Sun.
* 9.257 billion years (4.543–4.5 Gya): Solar System of Eight planets, four terrestrial ([[Mercury (planet)|Mercury]], [[Venus]], [[Earth]], [[Mars]]<!--(and maybe [[Fifth planet (hypothetical)|Fifth hypothtical planets]] a.k.a [[Planet V]] and [[Phaeton (hypothetical planet)|Phaeton]])-->) evolve around the Sun. Because of accretion many smaller planets form orbits around the proto-Sun some with conflicting orbits – [[early heavy bombardment]] begins. A large planetoid strikes Mercury, stripping it of outer envelope of original crust and mantle, leaving the planet's core exposed – Mercury's iron content is notably high.
* 9.266 billion years (4.533 Gya): Formation of Earth-[[Moon]] system following [[giant impact]] by hypothetical planetoid [[Theia (planet)]]. Moon's gravitational pull helps stabilize Earth's fluctuating [[axis of rotation]].
* 9.271 billion years (4.529 Gya): Major collision with a pluto-sized planetoid establishes the [[Martian dichotomy]] on Mars
* 9.3 billion years (4.5 Gya): Sun becomes a main sequence yellow star: formation of the [[Oort cloud]] and [[Kuiper belt]] 
* 9.396 billion years (4.404 Gya): [[Liquid water]] may have existed on the surface of the [[Earth]]
* 9.7 billion years (4.1 Gya): Resonance in Jupiter and Saturn's orbits moves Neptune out into the Kuiper belt causing a disruption among asteroids and comets there. As a result, [[Late Heavy Bombardment]] batters the inner Solar System. Meteorite impact creates the [[Hellas Planitia]] on Mars, the largest unambiguous structure on the planet.
* 10.4 billion years (3.5 Gya): Earliest fossil traces of life on Earth ([[stromatolite]]s)
* 10.6 billion years (3.2 Gya): Martian climate thins to its present density: groundwater stored in upper crust (megaregolith) begins to freeze, forming thick cryosphere overlying deeper zone of liquid water – dry ices composed of frozen carbon dioxide form 
* 10.8 billion years (3 Gya): [[Beethoven Basin]] forms on Mercury – unlike many basins of similar size on the Moon, Beethoven is not multi ringed and ejecta buries crater rim and is barely visible
* 11.6 billion years (2.2 Gya): Last great tectonic period in Martian geologic history: [[Valles Marineris]], largest canyon complex in the Solar System, forms – although some suggestions of thermokarst activity or even water erosion, it is suggested Valles Marineris is rift fault.