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- Satellite TV - What is a satellite
?
- Dictionary's define 'satellite' as; Man-made equipment
that orbits around the earth or the moon.
A satellite is basically any object that revolves around a planet in a circular or elliptical path. The moon is
Earth's 'natural' satellite and now there are many man made satellites much closer to Earth.
Satellites follow an orbit. In the orbit, the farthest point from Earth is the apogee, and the nearest point is
the perigee.
Artificial satellites generally are not mass-produced. Most satellites are custom built to perform their intended
functions. Exceptions include the GPS satellites (with over 20 copies in orbit) and the Iridium satellites (with
over 60 copies in orbit).
Approximately 23,000 items of space junk -- objects large enough to track with radar that were inadvertently placed
in orbit or have outlived their usefulness -- are floating above Earth.
The actual number varies depending on which agency is counting. Payloads that go into the wrong orbit, satellites
with run-down batteries, and leftover rocket boosters all contribute to the count. This online catalog of satellites
has almost 26,000 entries.
Although anything that is in orbit around Earth is technically a satellite, the term "satellite" is typically
used to describe a useful object placed in orbit on purpose to perform some specific mission or task. Some of the
more commonly know uses for satellites are weather satellites, communication satellites and scientific satellites.
- Satellite TV
- Satellite television is television delivered by
way of communications satellites, as compared to conventional terrestrial television and cable television. In many
areas of the world satellite television services supplement older terrestrial signals, providing a wider range
of channels and services, including subscription-only services.
Satellite Television definition by Wikipedia
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