near-circular orbit
121Cygnus X-1 — For other uses, see Cygnus X 1 (disambiguation). HDE 226868 HDE 226868 (not shown) is located next to the star η (lower center) in this map of constellation Cygnus …
122Shenzhou 6 — ] At 01:39 UTC Chen Bingde, the Chief Commander of the Chinese space program, announced the launch was successful. The crew ate their first meal in space at 03:11 UTC.Before the flight, the launch time had been the object of speculation by the… …
123SELENE — Infobox Spacecraft Name = nihongo|Kaguya|かぐや (SELENE) Caption = The mission mark of KAGUYA Organization = JAXA Major Contractors = Mission Type = Orbiter Flyby Of = Satellite Of = Moon Orbital Insertion Date = Launch = 01:31:01, 14 September,… …
124triton — /truy ton/, n. Physics. a positively charged particle consisting of a proton and two neutrons, equivalent to the nucleus of an atom of tritium. Cf. deuteron. [1930 35; < Gk tríton, neut. of trítos THIRD, equiv. to trí TRI + ton neut. adj. suffix; …
125Triton — Tritonic /truy ton ik/, adj. /truyt n/, n. 1. Class. Myth. a son of Poseidon and Amphitrite, represented as having the head and trunk of a man and the tail of a fish, and as using a conch shell trumpet. 2. Astron. a moon of Neptune. 3. (l.c.) any …
126Mechanics of planar particle motion — Classical mechanics Newton s Second Law History of classical mechanics  …
127Mean longitude — In astrodynamics or celestial dynamics, mean longitude is the longitude at which an orbiting body could be found if its orbit were circular, and free of perturbations, and if its inclination were zero. Both the mean longitude and the true… …
128Vulcan (hypothetical planet) — Vulcan was a small planet proposed to exist in an orbit between Mercury and the Sun in a 19th century hypothesis. This hypothesis has now been rendered obsolete by Albert Einstein s theory of general relativity.Argument for Vulcan s existenceIn… …
