how satellites are getting energy to rotate the earth?

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i want to how the satellites are getting fuel/energy to rotate the earth? how this is different from the different altittute of roaming? ex. moon, to geo stationery orbit , or communication satellite orbits etc

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Michael B

Solar panels

hopefully Zen

Solar Panels, from the sun.

Peter T

For most satellites, the energy to get them into their orbit came from the rocket atop which they were launched. Once up there they lose very little energy (there is some atmospheric drag in low Earth orbit at around 400 km altitude, but none at geostationary altitudes). Some satellites do contain maneuvering thrusters to boost or shift their orbits. Orbits higher than low Earth orbit are generally reached using an upper stage rocket. The lower stages get the satellite and its attached upper stage into a parking orbit at low altitude and then the upper stage rocket fires to boost the satellite to say a geostationary orbit (a transfer orbit at first, followed later by a second firing to circularise the orbit) or to an interplanetary transfer orbit.

It's Ray

Well to begin satellites mainly draw energy from the sun using solar panels. As far as positioning goes it deals a lot with its velocity and how far its from the earth(Gravitational pull). There are a few different orbit types as well the ones the main ones are polar orbit and geostationary.
Some satellites have mini thrusters to help it move propel it to its desired location.
here’s a neat little link
http://library.thinkquest.org/C007258/Keep_Orbit.htm
http://en.wikipedia.org/wiki/Satellite

Billy Butthead

Once a satellite is in orbit,it needs no energy to maintain that orbit.
A satellite continually falls towards the body it is orbiting but it’s horizontal speed prevents it from approaching that body and it makes no difference how far the satellite is in altitude,the farther away the slower it’s orbital speed..
The energy required for it to function in space is supplied by batteries and solar panels.

Al K

This is ridiculous!!!! It takes more energy to create solar panels ‘on the Earth’, than any solar panel has extraced energy from the sun.
This ‘Energy’ (to create solar panels) comes from the Earth, and the ‘Energy’ is lost in multiple proportions, in the waist of our inefficiency to deliver ‘things’ into space.

jrcg

The rocket used to launch the satellite is the primary source of this energy.
Once moving, unless there is something to slow the satellite down (such as air resistance), the satellite will keep its kinetic energy and will therefore keep travelling around the Earth.
Now, your other point. The higher a satellite orbits, the more energy it takes to arrive at that orbit.
So a Low Earth Orbit (LEO) satellite with an altitude of, say, 200km, will need a less energetic launch than one destined for geostationary orbit.
There are many complications (polar orbits, etc) but basically, the higher the orbit, the more energy is needed to get there.
[until, of course, you cease to be effectively influenced by the Earth and then it gets rather more complicated – google for sphere of influence, or look on wikipedia for that phrase]

Rueben Tekautz

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