What is a satellite?

the satellite is a moon planet or machine that revolves around a planet or Star. For example, the Earth is a satellite because it revolves around the sun. Similarly, the moon is a satellite because it revolves around the Earth. Usually, the word "satellite" to the machine to be launched into space and moves around Earth or another body in space.

the Earth and the moon are examples of natural satellites. Thousands of satellites, or man-made, orbiting the Earth. Captures some images of the planet that help meteorologists predict weather and track hurricanes. Captures some images of other planets, like The Sun, black holes, dark matter, or distant galaxies. Help these images scientists understand the solar system and the universe better.

still is the use of other satellites, mainly for communications, such as broadcast television signals and phone calls around the world. Form a group consisting of more than 20 satellites Global Positioning System or GPS. If you have a GPS receiver, that can satellites help in knowing your exact location.

What is the importance of satellites?
allow to see the horizon, which owns the satellites to see large areas of Earth at one time. And give this ability to the satellites can collect more data more quickly than existing devices on the ground.

the satellites can also see into space better than telescopes on the surface of the Earth. Because satellites fly above the clouds and dust particles in the atmosphere that can block visibility from ground level.

by the satellite, not the TV signal very far. Transmitted television signals in straight lines only. So they would send quickly to the space rather than follow the curve of the Earth. Sometimes you may give them mountains or high buildings. Phone calls to distant places is also a problem. The establishment of telephone wires over long distances or underwater is difficult and costs a lot.

with satellites, is send TV signals and phone calls to the satellite. After that, almost immediately, the satellite can send them to different locations on the Earth.
 

What are the parts of a satellite?
come the satellites in many shapes and sizes. But most of them are suspected in at least two parts - an antenna and power. Send the antenna information and receive, often from the Earth and to. Can be a source of energy a solar panel or battery. Produce solar panels for energy by converting sunlight into electricity.

download the many moons of NASA cameras and sensors scientific. Sometimes refer these instruments to the ground to collect information about land, air, and water. At other times, they are turning toward space to collect data from the solar system and the universe.

How to spin the satellite about the Earth?
is launching the most satellites into space on rockets. Rotating the satellite around the Earth when its speed is balanced drag Earth's gravity. Without this balance, the control of the satellite in a straight line into space or back to Earth. Spin the satellite around the Earth at different altitudes, different speeds and different distances. More types of orbit common are "geostationary" (jee-oh-STAY-shun-air-ee) and "polar".

moves geostationary satellite from West to east above the equator. It's moving in the same direction at the same rate of rotation of the Earth. From the ground, it looks like the satellite is geostationary, it still stands because it is always above the same location.

produce satellites revolving in polar orbit in the direction north-south from pole to pole. When the Earth rotates underneath, these satellites scan the entire globe, one partner at a time.

Why don't collide with the satellites of some other?
In fact, they can. NASA and other appropriate U.S. and international tracking satellites in space. Collisions are rare because when is the launch of the satellite, placed in orbit designed to avoid other satellites. But orbit can change over time. Increasing the chances of a collision with the launch more and more satellites in space.

in February 2009, hit two communications satellites - one American, the other Russian - in space. However, it is believed that this is the first time that a collision in which the Qumran industry two by mistake.

What is the first satellite in space?
was Sputnik 1 the first artificial satellite in space. Launched by the Soviet Union in 1957.

What is the history of the moons people?
NASA launched dozens of satellites in space, starting from the satellite Explorer 1 in 1958. Was Explorer 1 the first US satellite. It was the main instrument on-board sensor measures the particle high energy in space called cosmic rays.

came the first satellite photo of the Earth from explorer people 6 in 1959. Followed TIROS-1 in 1960 with the first image of the television of Earth from space. Didn't these pictures show a lot of detail. But they show that the satellite potential must change how people view Earth and space.

How to use NASA satellite today?
help of satellites NASA scientists in the study of Earth and space.

provide satellites that require to the earth information about clouds and oceans, land and ice. As they assess the existing gas in the atmosphere, such as ozone and carbon dioxide, the amount of energy absorbed by the Earth and emit. And watching the satellites, forest fires, volcanoes and smoke.

all these information will help scientists to predict weather and climate. Help information is also public health officials to track diseases and groups; and help farmers know the crops that they grow; and helps emergency workers to respond to natural disasters.

the satellite facing space have diverse functions. Watching the other rays of the risk coming from the sun. Explores other asteroids and comets, the history of stars, the origin of the planets. Flying some satellites close to the planets or other orbiting around it. Have been looking for this spacecraft for evidence of the presence of water on Mars or capture close rings of Saturn.

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