Celestial mechanics Celestial mechanics Celestial mechanics is the branch of astronomy that deals with the motions of objects in outer space. Historically, celestial mechanics applies principles of physics (classical mechanics) to astronomical objects, such as stars and planets, to produce ephemeris data. As an astronomical field of study, celestial mechanics includes the sub-fields of orbital mechanics, which deals with the launching and orbits artificial satellites, and lunar theory, a specialty which deals with the complications of the orbit of the Moon. Modern celestial mechanics tends to divide between five broad fields of study: All of the above fields overlap, but are sometimes
The Celestial Toymaker The Celestial Toymaker The Celestial Toymaker is the mostly missing sixth serial of the third season in the British science fiction television programme "Doctor Who", which was first broadcast in four weekly parts from 2 to 23 April 1966. In it the Doctor and his companions are pitted against a powerful adversary called the Celestial Toymaker. He separates the Doctor from his companions, and all are forced to win a series of games before they can be reunited and return to the TARDIS. Only the last episode of this story, "The Final Test", is held in the BBC archives; the