You have probably seen your share of mini-satellite dishes around town and are wondering what the hype is all about. The satellite captures the signal and sends it back to earth, where it is picked up by a satellite dish and relayed to a TV set. In most situation, cable TV offers up to 150 channels. Geocentric orbit : An orbit around the planet Earth, such as the Moon or artificial satellites Currently there are approximately 1,886 17 artificial satellites orbiting the Earth.

Communications satellites are stationed in space to provide a worldwide linkup of radio, telephone and television. Echo 1 was the first communications satellite to be launched in 1960. That’s because there is only so much room, or so many “slots” in that orbit, to allow the satellites to operate without interference.

A milestone of this success is the fact that satellite radio signals that are available across …