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
Celestial Eye of William T. Innes's "Goldfish Varieties and Tropical Aquarium Fishes" in 1917. American fanciers successfully bred the fish and, in turn, exported foundation stock to Great Britain. After World War II, and ever since, the majority of Celestials exported from Asia are of Chinese origin. A Celestial goldfish is depicted on a postage stamp issued in 1960 by the People's Republic of China. The Celestial is a goldfish that has an elongated egg-shaped body similar to the Bubble Eye. Like the Bubble Eye, the Celestial does not have a dorsal fin. Their paired fins are of the Fantail or Ryukin