タグ「space」のすごいエントリー
The files contain a wide range of UFO-related documents covering the years 1978���2002. So if you want to find out more about lights in the sky over Waterloo Bridge, near misses by pilots, crop circles - and what the UK government thought of it all - this is the place to start. The files are in PDF format. DEFE/31/172 - UFO incidents (14.6 Mb) DEFE/31/173 - UFO incidents (45.7 Mb) DEFE/31/174 - UFO incidents (22.6 Mb) DEFE/31/175 - UFO incidents (15.3 Mb) DEFE/24/1922 - UFO reports (13.8 Mb) DEFE/24/1... 続きを読む
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Between the launch of Sputnik on 4 October 1957 and 1 January 2008, approximately 4600 launches have placed some 6000 satellites into orbit, of which about 400 are travelling beyond geostationary orbit or on interplanetary trajectories.Today, it is estimated that only 800 satellites are operational - roughly 45 percent of these are both in LEO and GEO. Space debris comprise the ever-increasing amount of inactive space hardware in orbit around the Earth as well as fragments of spacecraft that have broken up,... 続きを読む
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