synchronous orbit
51Orbital station-keeping — In astrodynamics orbital station keeping is a term used to describe the orbital maneuvers made by thruster burns that are needed to keep a spacecraft in a particular assigned orbit. For many Earth satellites the effects of the non Keplerian… …
52Mercury (planet) — Mercury  ☿ …
53Europa (moon) — Europa Europa s trailing hemisphere in approximate natural color. The prominent crater in the lower right is Pwyll and the darker regions are areas where Europa s primarily water ice surface has a higher mineral content. Imaged on September 7,… …
54Defense Meteorological Satellite Program — DMSP images of Auroral bands circling north of Scandinavia The Defense Meteorological Satellite Program (DMSP) monitors meteorological, oceanographic, and solar terrestrial physics for the United States Department of Defense. The program is now… …
55Polar Satellite Launch Vehicle — Infobox Rocket name = Polar Satellite Launch Vehicle caption = PSLV C8 (CA Variant) carrying the AGILE x ray and γ ray astronomical satellite of the ASI lifting off from Sriharikota function = Expendable launch vehicle manufacturer = ISRO country …
56Mars — This article is about the planet. For other uses, see Mars (disambiguation) …
57Pluto — /plooh toh/, n. 1. Class. Myth. a name given to Hades, under which he is identified by the Romans with Orcus. 2. Astron. the planet ninth in order from the sun, having an equatorial diameter of about 2100 miles (3300 km), a mean distance from the …
58Space solar power — Space based solar power (SBSP or SSP) is the conversion of solar energy into power, usable either in space or on earth, from a location in space, usually geosynchronous orbit (GSO). Photovoltaics (PV) would generally be utilized for energy… …
59Phobos (moon) — Phobos Enhanced color view of Phobos obtained by Mars Reconnaissance Orbiter on March 23, 2008. Stickney crater, the largest, is on the right side. Discovery Discovered by …
60Wide-field Infrared Survey Explorer — (WISE) WISE prior to its mission into orbit …
