unstable orbit
41Hénon map — The Hénon map is a discrete time dynamical system. It is one of the most studied examples of dynamical systems that exhibit chaotic behavior. The Hénon map takes a point ( x , y ) in the plane and maps it to a new point :x {n+1} = y n+1 a x… …
42Cosmology — The Hubble Ultra Deep Field. Every speck of light in this image is an entire galaxy. This is just a small region of a Universe which could contain as many as 200 billion galaxies. Cosmology is the discipline that deals with the nature of the… …
43Ceres (dwarf planet) — For other uses of the name Ceres , see Ceres. Ceres   Ceres as seen by Hubble Space Telescope (ACS). The …
44Italy — /it l ee/, n. a republic in S Europe, comprising a peninsula S of the Alps, and Sicily, Sardinia, Elba, and other smaller islands: a kingdom 1870 1946. 57,534,088; 116,294 sq. mi. (301,200 sq. km). Cap.: Rome. Italian, Italia. * * * Italy… …
45Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
46Rössler attractor — The Rössler attractor (pronEng|ˈrɒslɚFact|date=December 2007) is the attractor for the Rössler system, a system of three non linear ordinary differential equations. These differential equations define a continuous time dynamical system that… …
47Atomic orbital — The shapes of the first five atomic orbitals: 1s, 2s, 2px, 2py, and 2pz. The colors show the wave function phase. These are graphs of ψ(x,y,z) functions which depend on the coordinates of one electron. To see the elongated shape of ψ(x,y,z)2… …
48Gliese 581 c — Planetbox begin name = Gliese 581 c Planetbox star star = Gliese 581 constell = Libra RA = RA|15|19|26 DEC = DEC|−07|43|20 dist ly = 19.9 dist pc = 6.12 class = M2.5VPlanetbox orbit period = 12.93cite encyclopedia | title = Planet : Gl 581 c |… …
49Fictional planets of the Solar System — The fictional portrayal of our Solar System has often included planets, moons, and other celestial objects which do not actually exist in reality. Some of these objects were, at one time, seriously considered as hypothetical planets which were… …
50Interplanetary Transport Network — The Interplanetary Transport Network (ITN) [Ross, S. D. 2006 [http://dx.doi.org/10.1511/2006.59.994 The Interplanetary Transport Network] . American Scientist 94:230 237.] is a collection of gravitationally determined pathways through the solar… …
