A satellite is a planet, car, or moon orbiting a specific star or planet. The word satellite generally refers to a car or object launched into space as it moves around the Earth or any other object in space. Scientists also use the term natural bodies that revolve around and follow other bodies, such as the Earth. As it revolves around the sun. However, the term satellite is mainly used for machines that are launched into space to orbit the planet and other objects, while this type of satellite helps astronomers to predict weather conditions, predict the weather, hurricanes and to help understand the solar system and the universe by observing distant galaxies and photographing the sun, other planets, and black holes. There are also many satellites used in communications around the world, both in telephone calls and in the broadcast signal of satellite channels, and one group of satellites makes up more than twenty satellites, where these satellites are used. in the precise positioning system (GPS).
As for how satellites orbit the Earth, they are first launched into space by placing them on rockets, then the speed of the satellite is balanced with the gravitational force of the Earth to stabilize the satellite on its orbit, and just in case this balance is not achieved, this moon will return to Earth or walk and move in a straight line in space. Satellites revolve around the planet at different speeds, heights, and trajectories, and among the most famous of these satellites are the planet’s fixed satellites and polar satellites. As for geostationary satellites, they rotate from west to east (above the equator), and the reason for its name is the constant because the direction of its movement is the direction and speed of rotation of the Earth itself. This is why it appears to be firmly related to the Earth, as with the polar moons, these are the moons that rotate from the North Pole to the South, while the Earth is below them, and for this reason, these satellites can reveal the whole world, with the caveat here that this type of satellite-only sends one each time. As for the first satellite launched into space, it was from the Soviet Union, and it was in 1957 AD, and the satellite was called (Sputnik 1).
The importance of satellites
Satellites are of great value and importance, in many fields such as aviation, communications, and meteorology, among others. Here are some of the benefits of satellites:
- Satellites collect information and data with great speed and accuracy, as they allow large areas and parts of the Earth to be viewed simultaneously.
- Satellites help to see space more clearly than is the case with telescopes on the Earth’s surface, and this is because satellites fly easily over dust, clouds, layers, and particles of the atmosphere.
- Facilitating phone calls, as in the past long and distant phone calls have encountered many difficulties and problems, as it is expensive to lay telephone cables underwater and over great distances, hence the satellites to which the signals are sent phone calls and the television has arrived from them to be sent after them to different places on planet earth.
Satellites vary in size and shape, but most satellites contain at least two main parts, namely the antenna and the power source, where the antenna sends and receives information to and from the earth, and the source power is a battery or solar panel that generates energy by converting sunlight and rays into electrical energy.
Does the satellite fall to the ground
Most satellites are constantly circling the Earth, as these satellites rotate in special orbits for periods that can reach hundreds of years before falling, and the rotation of the satellites around the Earth is controlled by several foundations and laws of physics. The missiles fall into orbit because the satellite is placed in the upper part of the atmosphere, while air resistance is almost non-existent, which maintains the speed of the satellite that was bombed. Where this speed exceeds the force of earth’s gravity, to launch the moon into outer space, with a force proportional to gravity, which keeps it in its orbit. In other words, satellites move around the Earth at great distances, because their movement is not affected by air resistance, and in the absence of gravity, the satellite moves in a straight line. at the speed and direction of the Earth itself. (the law of inertia), as the satellite is accelerated towards the earth by the force of gravity. The satellite falls, it does not fall to the ground, because the earth is round and in constant curvature.
Satellites do not collide with each other
In fact, a collision can happen between two satellites, but it happens in very, very rare cases as international and American organizations, including NASA, are working to monitor and track satellites in space. When launching a satellite, it is placed in an orbit specially designed to avoid a collision or collision with a moon Another industrial, but some changes may occur in these orbits due to the weather, which increases the chance of collision and one of the satellites that explode due to the launch of a large number of satellites into space. The first collision between two satellites is believed to have occurred in February 2009, when two satellites, one Russian and one American, collided.
The role of satellites in remote reconnaissance operations
Satellites are one of the most surprising discoveries that technology has made, as they are able to monitor the earth’s surface and its interior so that you can observe the depths of the seas and oceans with the utmost precision and below are some of the operations explorations carried out by satellites:
- Photo recognition: satellites capture precise and very clear images, using sensitive imaging equipment, as they can cover large areas and high altitudes.
- Nuclear Test Control: Major countries use satellites to monitor nuclear testing and activity and are also capable of monitoring any military movement or missile launches.
- A group of satellites is monitoring the climatic conditions surrounding the globe, and this is done through a comprehensive survey of large areas of the Earth, to predict weather conditions.