satellite

A satellite is an object that occurs in the orbit of another object. The term was initially used to describe a moon, or a celestial body that orbits a planet. Today, the term also refers to man-made objects that are placed in the orbit of the Earth or other planets. By analogy, the term can also refer to a dependent country called satellite state.

Artificial satellites can be used for many purposes, which most commonly include communication, navigation, weather forecasting and research. Real time vehicle tracking systems usually require data relayed by satellites to function properly. However, satellites can also provide internet, radio, telephony and television services.

The first human made satellite to be launched into Earth's orbit was the Soviet Sputnik 1 in 1957. Since then, more that 50 countries have contributed to the construction and launch of artificial satellites.

The largest artificial satellite orbiting the Earth today is the habitable International Space Station. The ISS is a joint project uniting the efforts of five space agencies: the US NASA, the Russian RKA, the Japanese JAXA, the European ESA, and the Canadian CSA. The ISS has been continuously occupied for over 11 years.

You'll find bloggers talking about satellites at sites like blogs.usda.gov.

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Original Technorati articles tagged “satellite”

• in Technology
  Crippled Russian Spacecraft Carries Toxic Payload
  Dangerous Russian space probe threatens to fall to Earth with toxic rocket fuel payload
  by goldnugget / on Nov 10, 2011
• in Technology
  Heads Up! Another Satellite is Falling to Earth
  Another satellite is expected to fall to Earth this weekend, with up to thirty pieces expected to survive re-entry.
  by goldnugget / on Oct 20, 2011
• in Technology
  Incoming Bus-Sized Satellite Will Track Over Western US Several Times On Final Day
  First day of Fall to be likely marked by falling bus-sized satellite.
  by paulkiser / on Sep 21, 2011

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