geostationary and
Geosynchronous satellites
While there are two main ways a satellite can orbit: equatorial and polar; there are actually an infinite number of ways, depending on their orbital angle of inclination. Equatorial orbits have 0 degrees of inclination, polar orbits have 90 degrees of inclination. Satellites can also orbit forward or retrograde, but it is much harder to launch into retrograde orbits so the vast majority are in forward orbits.
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what are the two main types of environment
there are two main types the marine and freshwater
A Satellite (like our moon) Orbiting bodies are in fact orbiting each other, so that there are binary stars (two stars of about equal size) that are orbiting each other, or even binary planets.
The two main types of friction are kinetic and static.
the two main types of communications are emailing and socialising
The two main types of friction are kinetic and static.
The two main types of economy are Command and Traditional.
what are the two main types of environment
The two main types of rockets are, Solid Fuel and Liquid Fuel