near-parabolic orbit
81Viking program — NASA s Viking program consisted of a pair of space probes sent to Mars, Viking 1 and Viking 2. Each vehicle was composed of two main parts, an orbiter designed to photograph the surface of Mars from orbit, and a lander designed to study the… …
82Venera 1 — Infobox Spacecraft Name = Venera 1 Caption = Venera 1 spacecraft Organization = USSR Major Contractors = Mission Type = Fly by of Venus Flyby Date = May 19, 1961 Launch = February 12, 1961 Launch Vehicle = Modified SS 6 (Sapwood) with 2nd… …
83small body — ▪ astronomy any natural solar system object other than the Sun and the major planets and dwarf planets and their satellites (moons). The small bodies populate the solar system in vast numbers and include the rocky asteroids (asteroid), or minor …
84Mariner 4 — Operator NASA Mission type Flyby Flyby of Mars …
85Halley's Comet — For the video game, see Halley s Comet (video game). 1P/Halley (Halley s Comet) Halley s Comet on March 8, 1986 Discovery …
86Science and mathematics from the Renaissance to Descartes — George Molland Early in the nineteenth century John Playfair wrote for the Encyclopaedia Britannica a long article entitled ‘Dissertation; exhibiting a General View of the Progress of Mathematics and Physical Science, since the Revival of Letters …
87Magellan probe — Infobox Spacecraft Name = Magellan Caption = Magellan spacecraft and Inertial Upper Stage being launched from the cargo bay of Space Shuttle Atlantis Organization = NASA, CNES Major Contractors = Mission Type = Orbiter Satellite Of = Venus… …
88Escape velocity — In physics, escape velocity is the speed where the kinetic energy of an object is equal to the magnitude of its gravitational potential energy, as calculated by the equation,:U g = frac{ Gm 1m 2}{r}.It is commonly described as the speed needed to …
89Lexell's Comet — D/1770 L1 (Lexell) Discovery Discovered by: Charles Messier Discovery date: June 14, 1770 Alternate designations: 1770 I, P/Lexell, Lexell s Comet Orbital characteristics A Perihelion …
90Astronaut — For other uses, see Astronaut (disambiguation). Cosmonaut redirects here. For other uses, see Cosmonaut (disambiguation). Astronaut Bruce McCandless II using a Manned Maneuvering Unit outside the United States Space Shuttle Challenger in 1984. An …
