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Astronomy · L5 · Planet Formation Channels and What Exoplanet Demographics Reveal · flowchart

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by @openstemUpdated Astronomy
Protoplanetary disk(gas + dust around young star)Formation pathwayDust grains coagulateto planetesimalsPlanetesimals builda solid core (~10 M⊕)Gas disk stillpresent?Runaway gas accretion:gas giant forms (~1–10 Myr)Remains a rocky/icy planetMassive, cold outer diskregion gravitationally unstableDirect fragmentationinto self-gravitating clumpsGas giant forms rapidly(~10³ years)Core accretion (bottom-up)YesNoDisk instability (top-down)

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