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
Solar mass measurement, the solar mass came into use before the AU and the gravitational constant were precisely measured. This is because the relative mass of another planet in the Solar System or the combined mass of two binary stars can be calculated in units of Solar mass directly from the orbital radius and orbital period of the planet or stars using Kepler's third law, provided that orbital radius is measured in astronomical units and orbital period is measured in years. The mass of the Sun has been decreasing since the time it formed. This occurs through two processes in nearly equal