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 Triad The Celestial Triad The Celestial Triad is a set of fantasy novels by Traci Harding. The story follows a 20th-century Australian woman who is transported to 5th century Wales in an attempt to change the future. Major themes within the series include time travel, martial arts, magic and psychic phenomenon. It is the second trilogy to feature the characters concerned, the first being "The Ancient Future Trilogy". Traci Harding returns to "The Ancient Future Trilogy" which ended with the 'Chosen' leaving Earth for the further reaches of space. Earth must follow its own path for a time while the gods