Satellites: it is an object that has been placed to orbit by human. They are launched to do specific job.
by: shiela mae aloot
YES
yes
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None. The Moon itself is a satellite of the Earth.
A GPS uses satallites to identify location
Both Mercury and Venus do not have Moons.
Spying. Both sides sent up Satallites to spy on each other.
Because you are in space. If you try calling someone in space, he or she wouldn't hear you.
Technically - they're constantly falling !... They're placed in a high enough orbit so that their forward speed counteracts the (much reduced) effect of gravity.
This depends on the area in which you live. In some areas satellite will be your only option. The one advantage that digital cable has is that it is not as affected by weather like the satallites are.
Satellites receive signals from Earth using antennas that are pointed towards the ground. The signals are sent from ground stations and relayed to the satellite. The satellite then processes the signal and can transmit it back to Earth or to another satellite.
Most satelites, are barley out of the earths atmosphere, for example a GPS or weather satelite would go here, but some satelites are as far away as jupiter. They were shot off at top speed around 40 years ago and will continue to move farther into the universe.