After the sun formed, the dust and gas left over from its natal cloud slowly swirled into the eight planets we have today. Small, rocky things clung close to the sun. Gigantic gas worlds floated in the system’s distant reaches.
As Planet Discoveries Pile Up, a Gap Appears in the Pattern | Quanta Magazi
As Planet Discoveries Pile Up, a Gap Appears in the Pattern | Quanta Magazi
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