How does an artificial satellite stay in orbit once correctly placed above Mars?

Answer 1

They usually get their energy from the Sun, but they may also have a nuclear reactor. That's how they get their energy; how they work in detail would depend on what they are supposed to do. There are satellites for many different purposes.

Answer 2

That's simply called "artificial satellite" or just "satellite".

Artificial is used to distinguish man made satellites from earths natural satellite, the moon.

The space lab is an artificial satellite. GPS satellites are artificial. There are also many communications satellites.

Answer 3

There's Low earth orbit, medium and high earth orbits.

Hubble, Mir (was) and the International space station are in the low earth orbits (among others including the polar orbiting satellites) These are between 212 and 1200 miles up.

Further out is the Medium earth orbit band, these satellites take longer to orbit the earth due to their increasing distance. At around 12000-13000 miles up are the GPS satellites, this is where the orbits are such that the satellites orbit the earth once every 12 hours (semi synchronous).

At 22,236 miles up is the boundary between medium and high earth orbit. Here, there are the geosynchronous satellites. It is at this height that the satellites take exactly 24 hours to orbit the earth, so they therefore can hold an 'apparent' position over one spot of the earth as it rotates. This makes easy tracking with a permanently fixed dish (such as a satellite TV dish).
Pretty much everywhere above the atmosphere. For example, the space station is about 200 miles above the surface of the Earth, and orbits every 90 minutes or so. Geosynchronous satellites are in a ring about 26,199 miles up. The GPS satellites are closer and appear to orbit the Earth once a day, any satellite farther than the geosynchronous distance seem to lag behind us. The paths the satellites are in depend entirely on their mission: for example we have some circumpolar satellites that cover both poles every orbit, whereas the geosynchronous ones are basically around the equator. Some other considerations are space debris (the Van Allen belts are pretty cluttered with high energy chunks that have taken out satellites very quickly), and the atmospheric drag tends to hinder them at about the Karman Line (100 km or so).

Answer 4

Please note that keeping in orbit around Earth requires no continuous energy supply. If a satellite has sufficient speed, it will continue orbiting the Earth (or some other object) on its own, for a long, long time.

Answer 5

mars's gavitational pull keeps it in track because it is so much larger than the satellite

Answer 6

they are kept in orbit by Ryan harker.

The gravitational force and the Satellite's velocity (speed at which it would travel in a straight line) is balanced.