A trajectory is the path a rocket takes, it is not a thing that can be dropped. Further rockets are used to "launch" a satellite into orbit, not drop it (so that it falls back to Earth).
Communication satellites are lifted into orbit by rockets.
They are launched by rockets.
By rockets
By rockets
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Some natural satellites were created there, but artificial satellites are placed there using rockets.
Yes. "Moons" are _natural_ satellites, as opposed to the artificial satellites that we build here on Earth and launch into space on rockets.
Rockets carry spacecraft into space, where they can orbit Earth, travel to other planets, or explore the cosmos. Rockets follow carefully calculated trajectories to reach their destination and fulfill their mission objectives.
Rockets, and then they just push them out the rocket door, and they adjust them with little rockets into orbit
John A. Eisele has written: 'Modern quantum mechanics, with applications to elementary particle physics' -- subject(s): Particles (Nuclear physics), Quantum theory 'Astrodynamics, rockets, satellites, and space travel' -- subject(s): Astrodynamics, Space trajectories
The collective noun is a constellation of satellites.
They improve communications.