We all have seen the launching of satellites. Be it the Indian Space Agency ISRO or the American space agency NASA, they all launch satellites. But have you ever heard that these satellites have been brought back? Usually this does not happen. But why? When spacecraft can be brought then why not these? Along with this, there is also a question that when their fuel gets exhausted then why do they not fall on the earth? What do the agencies do with them after the work is over? NASA has answered these interesting questions.
Like every other machine, satellites also do not last forever. Whether their job is to provide weather information, measure greenhouse gases in the atmosphere, or travel away from Earth to study the stars. All satellites age, wear out and get destroyed like old washing machines and vacuum cleaners.
Two things are possible with old satellites
According to NASA, two things can happen with old satellites. If the satellites which are very close to the Earth are finished and their fuel is also in the final stages, then scientists slow down their speed. So that it comes out of the orbit and falls towards the earth. As soon as it comes into the atmosphere, its speed becomes so fast that due to friction it burns and gets destroyed.
If the satellite is in Earth’s outer orbit
The second situation is that if the satellite is in the outer orbit of the Earth, that is, it is not so easy to bring it into the Earth’s atmosphere, then it is sent further away from the Earth. So that it leaves the Earth’s orbit and goes out. Such satellites disappear into space forever. These can never be searched again. Because it is an impossible task to contact them. It takes less fuel to blast satellites far into space than to send them back to Earth.
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FIRST PUBLISHED: February 10, 2024, 14:01 IST