co orbiting platforms
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Normalized Difference Vegetation Index — Negative values of NDVI (values approaching 1) correspond to water. Values close to zero ( 0.1 to 0.1) generally correspond to barren areas of rock, sand, or snow. Lastly, low, positive values represent shrub and grassland (approximately 0.2 to 0 … Wikipedia
Advanced Very High Resolution Radiometer — The Advanced Very High Resolution Radiometer (AVHRR) is a space borne sensor embarked on the National Oceanic and Atmospheric Administration (NOAA) family of polar orbiting platforms ( POES). AVHRR instruments measure the reflectance of the Earth … Wikipedia
International Space Station — ISS redirects here. For other uses, see ISS (disambiguation). International Space Station … Wikipedia
Mir — This article is about the Soviet/Russian space station. For other uses, see Mir (disambiguation). Mir … Wikipedia
space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… … Universalium
Space elevator — A space elevator for Earth would consist of a cable anchored to the Earth s equator, reaching into space. By attaching a counterweight at the end (or by further extending the cable upward for the same purpose), the center of mass is kept well… … Wikipedia
Marathon Trilogy — The cover box of the Marathon Trilogy Box set Genres First person shooter Developers Bungie Software Products Corporation Publishers … Wikipedia
Media and Publishing — ▪ 2007 Introduction The Frankfurt Book Fair enjoyed a record number of exhibitors, and the distribution of free newspapers surged. TV broadcasters experimented with ways of engaging their audience via the Internet; mobile TV grew; magazine… … Universalium
Geology of Mars — Mars Mars as seen by the Hubble Space Telescope Designations … Wikipedia
Anti-satellite weapon — Anti satellite weapons (ASATs) are space weapons designed to destroy satellites for strategic military purposes. Currently, only the USA, the former USSR and the People s Republic of China are known to have developed these weapons,with India… … Wikipedia
undersea exploration — Introduction the investigation and description of the ocean waters and the seafloor and of the Earth beneath. Primary objectives and accomplishments Included in the scope of undersea exploration are the physical and chemical… … Universalium