Question

Features of a satellite 4

Answer 1

What is a satellite ?An artificial satellite is a man made object placed into orbit around the Earth for the purpose of scientific research, weather reports, or military reconnaissance. Scientific satellites are set into orbit to observe the space environment, the Earth, the Sun, stars and extra galactic objects. These satellites have retrieved a huge amount of information helpful to scientific research. Weather satellites are used every day for meteorological forecasts and in shipping. Also military satellites play a important role in today's modern military. Satellites are extremely important today. All artificial satellites have certain features in common. They all include radar systems, sensors like optical devices in observation satellites and receivers and transmitters in communication satellites. Solar cells are used to generate power for the satellites and in some cases ,nuclear power is used. All satellites need altitude-control equipment to keep the satellite in the desired orbit.( Grolier Encyclopedia). All this information should answer the question what is a satellite.Orbit of a SatelliteThe orbit of the satellite is achieved when it is given a horizontal velocity of 17,500 mph at sea level causing the Earth's surface to curve away and as fast as it curves away gravity pulls the object downward and at this point the satellite achieved orbit. As the altitude of the satellite increases, its velocity decreases and its period increases. The period of satellite is the time the satellite takes to make on revolution around the Earth. Satellites in later orbit are called synchronous satellites. If the satellite orbits in a equatorial plane, it is called geostationary which means it is always over the same place on earth at all times. This form of orbit is used in weather for reports of a certain area at all times.( Grolier Encyclopedia ) The orbit of a satellite is very scientific but not hard to understand.Repairing a SatelliteMost people would think how can you repair a satellite when you are on earth at it is in orbit above you in space. the only possible way to repair satellites is to go into space and get them. That seems like a hard task almost impossible although it is hard today it is capable by space shuttle. The astronauts have to grab hold of the satellite by the arm in the shuttle then lock down the satellite in the shuttle's payload pay. The next step in the process would be to make a series of space walks by the astronauts to repair or in some cases replace malfunctioning systems.

Answer 2

Answer:

An artificial body located in orbit around the earth or moon or different asteroid to accumulate information or for connection is called a satellite. The following are the main characteristics of a satellite:

1. A satellite does not possess its own light but reflects it from the sun.

2. It switches its phases systematically.

3. A satellite rotates around an asteroid, not the sun

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