Nowadays, the number of satellites orbiting the Earth has significantly increased. There are 7.500 satellites around the Earth according to the United Nations’ Outer Space Object Index in September 2021. The motion of satellites is a marvelous example of circular motion in real life since they move around the Earth in elliptical orbit. Actually, before taking this class about motion, I wasn’t aware of the fact that my life was based on the circular movement of satellites. They are used for GPS, beaming TV signals and phone calls around the world, satellites also assist science by taking pictures of other planets, sun, and faraway galaxies. I cannot imagine a world without internet and phone calls. Therefore, this unit showed me that almost everything that I am grateful for is thanks to the circular motion of spacecraft. It basically falls under the field of science of physics, astronomy and aerospace. Moreover, I believe Russian scientist Konstantin Tsiolkovsky has contributed to launching satellites the most because of his studies which mathematically showed an artificial satellite was feasible. Creating spacecrafts, aircrafts, satellites, and missiles requires extensive training and education based on aerospace engineering. Aerospace engineers must have a bachelor’s degree in aerospace engineering or another field of engineering or science related to aerospace systems. Also the ones who will work in national defense projects may need security clearance as well. To conclude, satellites that are designed by aerospace engineers, move in a circular orbit around the world which is a spectacular application of circular motion in astronomy.
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