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Satellites
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In the context of spaceflight, a satellite is any object which has been placed into orbit by human endeavor. They are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon. The United States Space Surveillance Network (SSN) has been tracking space objects since 1957 when the Soviets opened the space age with the launch of Sputnik I. Since then, the SSN has tracked more than 26,000 space objects orbiting Earth. The SSN currently tracks more than 8,000 man-made orbiting objects. The rest have re-entered Earth's turbulent atmosphere and disintegrated, or survived re-entry and impacted the Earth. The space objects now orbiting Earth range from satellites weighing several tons to pieces of spent rocket bodies weighing only 10 pounds. About seven percent of the space objects are operational satellites (i.e. - ~560 satellites), the rest are debris. USSTRATCOM is primarily interested in the active satellites, but also tracks space debris which upon reentry might otherwise be mistaken for incoming missiles. The SSN tracks space objects that are 10 centimeters in diameter (baseball size) or larger.
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A New Year And An Anniversary
Wed, 31 Dec 2008 08:09:36 GMT
Hello and Happy New Year, astro-nuts! Today is the final day of 2008, and I hope all of you have a great time celebrating tonight, but please be safe! Some areas are going to have some not-so-great weather ...
Diary:
Wed, 31 Dec 2008 06:15:04 GMT
There is a downside to all great inventions and developments. That includes the GPS receiver you bought for your spouse at Christmas so he or she can find California Settlement and not set you down in Los ...
New Year on hold...for a second
Wed, 31 Dec 2008 11:32:16 GMT
Watch New Year's Eve celebrations from around the world starting with Sydney at 1.50pm exclusively on RTE.ie/live Eager to see the end of 2008? Be forewarned: the world's official timekeeper has decided to ...
Knightley's 'The Duchess' and LaBeouf's 'Eagle Eye' are Blu-ray wonders this week...
Wed, 31 Dec 2008 01:58:29 GMT
Making-of documentary taped in hi-def. THINK OF THIS MOVIE as a Gainsborough tableau vivant.
New Year on hold: Leap second makes time stand still
Wed, 31 Dec 2008 01:29:46 GMT
Paris: Eager to see the back end of 2008? Be forewarned: the world's official timekeeper has decided to prolong the year-by one full second, to be precise.
Air Force Renews Boeing, Lockheed Contest for $11 Billion Satellite System...
Tue, 30 Dec 2008 21:28:25 GMT
The Air Force formally renewed a competition between Boeing Co. and Lockheed Martin Corp.
More
Tue, 30 Dec 2008 17:53:31 GMT
There is no gainsaying the fact that the year 2008 has been quite a good year for Ghana sports, especially in soccer, boxing and table tennis among others.
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Tue, 06 Jan 2009 04:11:47 GMT
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Leap second makes time stand still
Tue, 30 Dec 2008 10:19:33 GMT
Paris - Eager to see the back end of 2008? Be forewarned: the world's official timekeeper has decided to prolong the year - by one full second, to be precise.
New Year on hold: leap second makes time stand still
Tue, 30 Dec 2008 01:26:36 GMT
Eager to see the back end of 2008? Be forewarned: the worlda s official timekeeper has decided to prolong the year - by one full second, to be precise.
The top stories of 2008: Concerts
Tue, 30 Dec 2008 01:15:19 GMT
From huge shows at the steamy state fair grandstand and revved-up Event Center to intimate shows in cozy rooms like the Redhouse and Westcott Community Center, there was a wide swath of notable concerts ...
Russia Launches Three New Glonass Navigation Satellites
Mon, 29 Dec 2008 21:40:08 GMT
Russia's Federal Space Agency has successfully launched three new Glonass navigation and positioning satellites from the Baikonur Cosmodrome in Kazakhstan aboard a Proton-M rocket.
Satellites Could Track Oregon Vehicles For 'Mileage Tax' to Replace Gas Tax...
Mon, 29 Dec 2008 19:42:18 GMT
Governor Kulongoski says he plans to ask the Legislature to begin moving Oregon away from the gas tax as the central funding source for transportation and to replace it with a mileage tax boosted by satellite ...
Satellites Unearthing Ancient Egyptian Ruins
Mon, 29 Dec 2008 19:25:54 GMT
Archaeologists believe they have unearthed only a small fraction of Egypt's ancient ruins, but they're making new discoveries with help from high-tech allies - satellites that peer into the past from the ...