The Man from Planet X The Man from Planet X The Man from Planet X is a 1951 independently made American black-and-white science fiction horror film, produced by Jack Pollexfen and Aubrey Wisberg, directed by Edgar G. Ulmer, that stars Robert Clarke, Margaret Field, and William Schallert. The film was distributed by United Artists. A scientist is monitoring a mysterious "Planet X" that has entered our solar system and is now near the Earth. A spaceship from the planet lands, and a space-suited humanoid emerges who speaks in musical tones. The alien makes contact with a small pocket of humanity in an isolated, fog-shrouded Scottish
Five-planet Nice model Five-planet Nice model The five-planet Nice model is a recent variation of the Nice model that begins with five giant planets, the current four plus an additional ice giant, in a chain of mean-motion resonances. After the resonance chain is broken, the five giant planets undergo a period of planetesimal-driven migration, followed by a gravitational instability similar to that in the original Nice model. During the instability the additional giant planet is scattered inward onto a Jupiter-crossing orbit and is ejected from the Solar System following an encounter with Jupiter. An early Solar System with five giant planets was proposed