Trojan (celestial body) Trojan (celestial body) In astronomy, a trojan is a minor planet or moon that shares the orbit of a planet or larger moon, wherein the trojan remains in the same, stable position relative to the larger object. In particular, a trojan remains near one of the two trojan points of stability – designated and – which lie approximately 60° ahead of and behind the larger body, respectively. Trojan points make up two of five types of Lagrangian points, and a trojan is a type of Lagrangian object. They are one type of co-orbital object. In this arrangement, the massive star
The Celestial Sphere The Celestial Sphere The Celestial Sphere is a large scale oratorio for chorus and orchestra by Charles Wuorinen, commissioned by Augustana College (Rock Island, Illinois) for the 100th anniversary of the Handel Oratorio Society, which gave the premiere performance on 25 April 1981 under the direction of Donald Morrison, conductor. The composition was composed 2 January - 9 September 1980, in Baltimore, Binghamton (NY), Buffalo (NY), Gardiner (MA), Iowa City (IA), Jackson Hole (WY), Los Angeles, Middle Valley (NJ), New York City, Rock Island (IL), and San Francisco. The score is published by C.F. Peters, EP 66851. Texts from William