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Fifth Giant
Hypothetical gas giant ejected out of the Solar System
Hypothetical gas giant ejected out of the Solar System
The Fifth Giant is a hypothetical ice giant proposed as part of the five-planet Nice model, an extension of the Nice model of Solar System evolution. This hypothesis suggests that the early Solar System once contained a fifth giant planet in addition to the four currently known giant planets: Jupiter, Saturn, Uranus, and Neptune. The Fifth Giant is theorized to have been ejected from the Solar System due to gravitational interactions with Saturn and Jupiter during the chaotic phase of planetary migration, approximately 4.1 billion years ago.
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