That tug toward Earth--combined with the momentum from the rocket… …causes the satellite to follow a circular path around Earth: an orbit. But finding this balance is sort of tricky. Gravity is stronger the closer you are to Earth.
And satellites that orbit close to Earth must travel at very high speeds to stay in orbit. It has to travel at 17, miles per hour to stay in orbit. It only has to travel about 6, miles per hour to overcome gravity and stay in orbit.
Low-orbiting satellites below a few thousand kilometres are low enough that drag from the air has a big effect, and over time, the orbit will decay. So the drag from the air slows the satellite down, the satellite loses energy and the size of the orbit gets smaller and smaller until it gets into a part of the air where friction builds up so much that the satellite just burns up.
The orbit will tend to shift over time but it will stay orbiting the Earth in the same way that the Moon still orbits the Earth after millions of years. A satellite has a useful lifetime of between 5 and 15 years depending on the satellite. Acknowledgements: Andrew Z. Launching a satellite into orbit requires consideration of a number of major science ideas. These include gravity, circular motion and atmospheric drag. Atmospheric drag Satellites need to be If you think it is hard to keep your bedroom tidy, spare a thought for the space around our Earth.
There are over million particles of space junk out there, and humans are responsible for all For years, government and commercial operators sought to extend the life of satellites by sending them into orbit with plenty of fuel and components designed to withstand 15 years of harsh radiation.
Now, the market is diversifying. Customers want everything from cubesats built for six-month missions to geostationary communications satellites designed to last decades. If Jean-Luc Froeliger, Intelsat vice president for satellite operations and engineering, had his way, satellites would function indefinitely.
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