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 . [ 1 ]

2018年10月5日 · But a fifth giant planet, many researchers suspect, could be the hero that this mystery needs, and a critical missing player in the history of the solar system. To re-create these ancient...

The Fifth Giant is a planet proposed by the Five-planet Nice model and the Jumping-Jupiter scenario, theorized to have orbited between Saturn and Uranus during the early formation of the Solar System. Over time, Neptune migrated outward, disturbing the Fifth Giant’s orbit.

The five-planet Nice model is a numerical model of the early Solar System that is a revised variation of the Nice model. It begins with five giant planets, the four that exist today plus an additional ice giant between Saturn and Uranus in a chain of mean-motion resonances.

2011年9月22日 · That’s the conclusion from a computer simulation of the solar system’s evolution, which suggests the fifth giant was hurled into interstellar space some 4 billion years ago, after a violent...

Theia (/ ˈ θ iː ə /) is a hypothesized ancient planet in the early Solar System which, according to the giant-impact hypothesis, collided with the early Earth around 4.5 billion years ago, with some of the resulting ejected debris coalescing to form the Moon. [1] [2] Collision simulations support the idea that the large low-shear-velocity provinces in the lower mantle may be remnants of Theia.

2012年4月20日 · Simulations suggest that this ejected fifth planet preserves the solar system observed today when it resides for a short time between Saturn and the ice giants, Nesvorny reported in December...

2011年11月18日 · During more than 6,000 simulations of this planetary scattering phase, planetary scientist David Nesvorny at the Southwest Research Institute in Boulder, Colo., found that a solar system that began...

2011年11月10日 · Earth’s place in the “Goldilocks” zone of our solar system may be the result of the expulsion of a fifth giant planet from our solar system during its first 600 million years, according to a...

2015年9月17日 · Statistically, some of the most successful dynamical evolution simulations have initially included a hypothetical fifth giant planet, of ice giant mass, which gets ejected by a gas giant during the early solar system's proposed instability phase.