Act as eyes in the sky and mirror space that reflects a phone call from the Earth is one of two of some of the main functions of a satellite for human life. Thousands of satellites are engineered with careful flying around the sky of the earth, which cannot be seen with the naked eye.
The satellite, which are out of sight and out of mind, it may often be underestimated by humans. In fact, the satellite plays an important role in everything from broadcast TV, phone calls cross the continent, to weather forecasts and the Internet.
A satellite is a moon, planet or machine that orbits a planet or star. For example, Earth is a satellite because it orbits the sun. Likewise, the moon is a satellite because it orbits the Earth. Usually, the word “satellite” refers to a machine that is launched into space and moves around Earth or other objects in outer space.
However, what exactly satellites and how satellite that? The following information more interesting to be studied, reported from nasa.gov.
Know What It Is Satellite
A satellite is any object that moves in a curved trajectory around the planet. Moon is a natural satellite of the original Earth, and there are also many man-made satellite, which is usually circulated closer to the Earth. The path through which the satellite’s orbit, which is sometimes shaped circles.
To understand why a satellite moving in a circular manner, You must understand the principle of Newton force first. Newton proposed that the force of gravity between two objects in the universe. If it wasn’t for this style, the satellite moves in near a planet will continue to move with speed and in the same direction, i.e. a straight line.
However, the path of inertia of a straight line satellite is balanced by the gravitational pull of the strong directed to the center of the planet. Sometimes, the orbit of the satellite looks like ellipse, circle squashed the deal in about two point known as the focus. The basic laws of motion the same applies, except that the planet is located at one focus.
As a result, the total force applied on the satellite is not uniform along the orbit, and the speed of the satellite is changing on a constant basis. He moves fastest when closest to the planet that is at the point known as perigee, and slowest when farthest from the planet that is at the point known as the apogee.
Some of the satellite tasked with taking pictures of the planet that help meteorologists predict weather and track hurricanes. Some of the satellites take pictures of other planets, the sun, black holes, dark matter or faraway galaxies. These pictures help scientists better understand the solar system and the universe.
Other satellites are still used mainly for communications, such as emitting TV signals and phone calls around the world. A group of more than 20 satellites form the Global Positioning System, or GPS. These satellites can help figure out the exact location of You.
The Important Role Of Satellite
The widespread view that owned the satellite allowed her to observe a large area of the Earth at one time. With this capability, the satellites can collect more data more quickly than instruments on the ground.
The satellite also can see into space better than telescopes at earth’s surface. That’s because satellites fly above the clouds, dust, and molecules in the atmosphere that can obstruct the view of the surface of the soil.
Before satellites, TV signals can not reach too far. TV signal only move in a straight line. So, this signal will quickly go into space instead of following the curve of the Earth. Sometimes, the mountains or high buildings can even block the signal on this TV.
Phone calls to far-off places also become a problem. Install the telephone cable remote or under water is a difficult thing to do, and if done, it will require a lot of cost.
But with satellites, TV signals and phone calls sent to the top. Then, almost instantly, the satellite can send them back to a different location on Earth. It is certainly easy to human activity.
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