Johannes Kepler.
All the ones further out than the Earth, in contrast to the ones with inner orbits, called 'hot' planets.
Anything that orbits a planet is called a satellite. There are 2 types: artificial (the ones we make take the old Sputnik for example) and natural (the Moon)
The Moon is the only natural one, and there areseveral hundred artificial (man-made) ones.
Of all the significant bodies in the solar system, comets are the ones with -- the most eccentric elliptical orbits -- the orbits most inclined to the plane of the ecliptic -- the most volatile compositions
The orbits of periodic comets and the orbits of planets have the same geometric shape.Every closed gravitational orbit is an ellipse. But the eccentricity of the cometary ellipsesare almost all greater than the eccentricities of the planetary ones.
The Abyssinian Crisis.
They have many names. Common ones are orbitals or energy levels.
The definition of a satellite be it man made or natural is, a body that orbits the parent. The earth is a satellite of the sun, the moon is a satellite of the earth ans so are all the man made ones we put in space.
The outer planets take much more time and also travel longer to complete a whole orbit around the Sun, than the inner ones.
They were considered worthless by the British and French, but they proved they were a great asset, them being the ones to have assured the fate of WWI and Germany.
It would depend on how big they were. Small ones would make no difference but large ones would probably interfere with each other's orbits and crash.
This question is nonsense. There is no need to "keep" the moon and planets in their orbits; the laws of physics ensure they stay there. The "conditions"... well, look around you. They're in their orbits now, so the current "conditions" must be the ones which apply when they are.