Every satellite will carry its own unique set of instruments or technology, relevant to the mission. Satellite reading in the outer space will have a telescope that can be seen in different wavelengths of light that can monitor the weather and might have a camera to measure cloud movement, while one used for communications that enables it to forward the messages back to one part of the Earth that have been sent up from another part.
They will also have a set of devices called “subsystems” that will support the power of satellite, co-ordinate the instruments and send data back to Earth. The subsystem that powers the satellite will include solar panels that gather energy from the Sun. Some satellites, such as Hubble are launched through a space shuttle. But the mainstream will be sent into orbit on rockets, which then fall into the ocean when they’ve used up all their fuel. In fact, there are two factors combine to keep a satellite in orbit: the speed of the satellite and the gravitational pull between the Earth and the satellite.
On the other hand, satellite will stay in orbit until it starts slowing down. Gravity will then pull it into a deeper part of the atmosphere and the friction generated as the satellite moves at very high speed during this denser atmosphere generates a lot of heat which can be sufficient to cause the satellite to burn up before it reaches the Earth’s surface. The ones that are too big to burn up are directed to come down in a remote part of the ocean away from people. Small satellite technology that is being pioneered in the UK uses a series of new techniques that enable scientists to build and to launch satellites faster and for much less money. Many of these new small or micro satellites are presently being tested to identify whether simple or economically-built spacecraft that can be achieve the same results as traditional satellites. These new system could have a massive impact on the future of space operations and significantly decrease the cost of launching satellites.