Satellites orbit Earth from "summary" of Space Encyclopedia by David A. Aguilar,Christine Pulliam,Patricia Daniels
Satellites, man-made objects launched into space, play a crucial role in modern communication, weather forecasting, navigation, and scientific research. These satellites orbit Earth at various distances, speeds, and directions, depending on their specific mission. Some satellites, like those used for communication, are placed in geostationary orbit, staying fixed above a particular point on Earth's equator. This allows them to maintain constant communication with a specific location on the ground. Other satellites, such as those used for weather forecasting, are placed in polar orbits that allow them to cover the entire surface of the Earth over time. These satellites circle the planet from pole to pole, providing comprehensive data on weather patterns and climate changes. Additionally, there are satellites in low Earth orbit that are used for scientific research, Earth observation, and space exploration. The orbits of satellites are carefully calculated to ensure that they remain stable and continue to perform their intended functions. Satellites are equipped with thrusters or gyroscopes that help them maintain their position in orbit and adjust their trajectory if necessary. Ground controllers monitor and communicate with satellites to ensure their proper functioning and safety. Satellites are launched into space using rockets, which propel them into their designated orbit. Once in orbit, satellites rely on solar panels or onboard batteries to power their instruments and systems. They are also equipped with antennas, sensors, cameras, and other instruments necessary to carry out their missions effectively.- Satellites orbiting Earth are essential tools for modern society, providing valuable data and services that benefit humanity in numerous ways. They have revolutionized communication, navigation, weather forecasting, scientific research, and space exploration, making them indispensable components of our technological infrastructure.
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