DATABASE: Satellite Tally

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Science  17 Feb 2006:
Vol. 311, Issue 5763, pp. 925
DOI: 10.1126/science.311.5763.925d

Need a complete list of the satellites hovering above Earth? The Union of Concerned Scientists' global security section has toted up all 800 or so active satellites and posted the information as an Excel spreadsheet. Twenty-one data fields include altitude, launch date, manufacturer, and whether the craft is up there for military or civilian purposes. The data show that the United States has the most satellites, followed by Russia and China.

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