The article describes how the satellite differs from a rocket, their types are considered, as well as why they are needed and how they affect the planets.
The beginning of the space age
From the very beginning of the development of astronomy and the discovery of other planets, people dreamed of flying to the stars. But this desire was realized only relatively recently, in the second half of the 20th century. And a bit later, the active development of near-Earth space began. Although, I must say, quite modest, but it is a matter of time. And often in the night sky you can see fast-moving bright points, artificial satellites of the Earth. But how is a satellite different from a rocket if both are built by humans and launched into space? This we will understand.
Their types
First you need to decide on their variety. Satellites are artificial and natural. Let's start with the first.
Artificial
An artificial satellite is a small spacecraft on board of which there are no people. It is launched into near-Earth orbit, where it moves around the Earth under the influence of its gravity and centrifugal force, which does not allow it to fly away or fall back onto the planet. The purpose of the satellites is very different: observation of weather conditions, providing communication between different hemispheres and distant corners of the earth, photo and video. They are also military and provide various kinds of control. But how is a satellite different from a rocket that can do the same?
In fact this is not true. The rocket, of course, can also be equipped with scientific or observational equipment and put into orbit, but nevertheless its task is to deliver astronauts, cargoes, and the same satellites to near-Earth space. Or a flight to the moon, as it was in the late 70s of the last century. So we sorted out the answer to the question of how the satellite differs from a rocket.
By the way, the first satellite in the history of mankind was put into orbit by the Soviet Union in 1957.
All objects were created there, orbiting temporarily or permanently around our planet, whether it be the ISS, a spaceship or otherwise.
Natural satellites
This class includes objects that have always been in orbit of planets and have not been created by humans. For example, the moon. The principles of movement and retention are the same: gravity and centrifugal force. Our neighbor is leading in size among all the satellites of the solar system. But, for example, the same Saturn has such natural attendants as much as 62! But Uranus and Neptune do not have them at all.
So now we know how a satellite differs from a rocket.