earth-centered orbit
21Ground track — A ground track or ground trace is the projection of a satellite s orbit onto the surface of the Earth (or whatever body the satellite is orbiting). It is an imaginary path along the Earth s surface which traces the movement of an imaginary line… …
22Heliocentrism — Heliocentric redirects here. For the albums, see Heliocentric (Paul Weller album) and Heliocentric (The Ocean Collective album). Heliocentric Universe …
23STEREO — Infobox Spacecraft Name = STEREO Caption = One of two STEREO spacecraft Organization = NASA Major Contractors = Johns Hopkins University Applied Physics Laboratory Collaborators = U of M the Paris Observatory Berkeley U.S. Naval Research… …
24Apollo 15 — Infobox Space mission mission name = Apollo 15 insignia = Apollo 15 insignia.png stats ref = cite web |url=http://history.nasa.gov/SP 4029/Apollo 00g Table of Contents.htm |title= Apollo by the Numbers: A Statistical Reference (SP 4029)… …
25Milky Way — This article is about the galaxy. For other uses, see Milky Way (disambiguation). Milky Way galaxy Image of the Milky Way s Galactic Center in the night sky above Paranal Observatory Observation data …
26FTL Newsfeed — The first show ever shown on the SciFi Channel, FTL Newsfeeds were 30 second snippets of fictitious news info that were supposed to have come from the year 2142. This future timeline was fraught with stories of genetic engineering issues,… …
27Clementine (spacecraft) — This article is about the American Lunar probe. For the French satellite, see Clementine (satellite). Clementine Organization BMDO / NASA Major contractors Naval Research Laboratory Mission type …
28Cospas-Sarsat — Logo of Cospas Sarsat Logo as used until 1992 Cospas Sa …
29Circle of latitude — Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are actually halves of great ellipses, with identical radii at a given latitude. Latitude (φ) Lines of latitude appear …
30Copernican heliocentrism — Heliocentric model from Nicolaus Copernicus De revolutionibus orbium coelestium Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. It positioned the Sun near the center of… …
