perturbed motion
91Lagrangian point — The Lagrangian points (IPA en|ləˈgreɪndʒiən, IPA fr|lagʁɑ̃ʒjɑ̃; also Lagrange point, L point, or libration point), are the five positions in an orbital configuration where a small object affected only by gravity can theoretically be stationary… …
92Population inversion — In physics, specifically statistical mechanics, a population inversion occurs when a system (such as a group of atoms or molecules) exists in state with more members in an excited state than in lower energy states. The concept is of fundamental… …
93Year — A year (from Old English gēar) is the orbital period of the Earth moving around the Sun. For an observer on Earth, this corresponds to the period it takes the Sun to complete one course throughout the zodiac along the ecliptic. In astronomy, the… …
94Crystal structure — In mineralogy and crystallography, crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid. A crystal structure is composed of a pattern, a set of atoms arranged in a particular way, and a lattice… …
9581P/Wild — Comet Wild 2 (81P/Wild) nucleus in 2004 Discovery Discovered by: Paul Wild Discovery date: 1978 Alternate designations: 1978 XI; 1984 XIV; 1990 XXVIII …
96Attractor — For other uses, see Attractor (disambiguation). Visual representation of a strange attractor An attractor is a set towards which a dynamical system evolves over time. That is, points that get close enough to the attractor remain close even if… …
97Crystallite — Galvanized surface with visible crystallites of zinc. Crystallites in the steel under the coating are microscopic. Crystallites are small, often microscopic crystals that, held together through highly defective boundaries, constitute a… …
98John Dillon — (4 September 1851 – 4 August 1927) was an Irish land reform agitator, Irish Home Rule activist, nationalist politician, Member of Parliament (MP) in the House of Commons of the United Kingdom of Great Britain and Ireland and last leader of the… …
999 Metis — For the moon of Jupiter, see Metis (moon). 9 Metis   Discovery Discovered by A. Graham Discovery date 25 April 1848 …
100Moons of Uranus — Uranus and its six largest moons compared at their proper relative sizes and relative positions. From left to right: Puck, Miranda, Ariel, Umbriel, Titania and Oberon Uranus, the seventh planet of the Solar System, has 27 known moons …
