the ascending node
31celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… …
32Saros (astronomy) — The saros i/ˈsɛərɒ …
33Saros cycle — The Saros cycle is an eclipse cycle with a period of about 18 years 11 days 8 hours (approximately 6585⅓ days) that can be used to predict eclipses of the Sun and Moon. One Saros after an eclipse, the Sun, Earth, and Moon return to approximately… …
34Argument of periapsis — The argument of periapsis (or argument of perifocus) ( ω ) is the orbital element describing the angle of an orbiting body s periapsis (the point of closest approach to the central body), relative to its ascending node (the point where the body… …
35Ecliptic — The ecliptic is the apparent path that the Sun traces out in the sky during the year. As it appears to move in the sky in relation to the stars, the apparent path aligns with the planets throughout the course of the year. More accurately, it is… …
36Full moon cycle — The full moon cycle is a cycle of about 14 lunations over which full moons vary in apparent size and age (time since new moon). The sequence is *Full moon big (perigee at full moon) *Full moon young (perigee at first quarter) *Full moon small… …
37Semi-major axis — The semi major axis of an ellipse The major axis of an ellipse is its longest diameter, a line that runs through the centre and both foci, its ends being at the widest points of the shape. The semi major axis is one half of the major axis, and… …
38Kreutz Sungrazers — The Kreutz Sungrazers (pronEng|ˈkrɔɪts) are sungrazing comets of a particular family. They are believed to be fragments of one large comet that broke up several centuries ago and are named for the astronomer Heinrich Kreutz, who first… …
39Semi-minor axis — The semi minor axis of an ellipse In geometry, the semi minor axis (also semiminor axis) is a line segment associated with most conic sections (that is, with ellipses and hyperbolas). One end of the segment is the center of the conic section, and …
40Geostationary ring — The geostationary ring is a volume segment around the geostationary orbit defined by variations in altitude and declination that can occur for uncontrolled objects left in the geostationary orbit.The geostationary orbit is subject to orbit… …
