UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Scientists use satellites to study space because they can fly above the clouds.
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Some satellites use energy from the sun to stay powered while orbiting Earth.
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Earth and the moon are examples of natural satellites that orbit larger bodies.
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Satellites are used in many ways to help people communicate with each other and gather information.
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Detailed explanation-1: -The main advantage of satellites is that they can distribute signals from one point to many locations. As such, satellite technology is ideal for “point-to-multipoint” communications such as broadcasting.
Detailed explanation-2: -Some take pictures of other planets, the sun, black holes, dark matter or faraway galaxies. These pictures help scientists better understand the solar system and universe. Still other satellites are used mainly for communications, such as beaming TV signals and phone calls around the world.
Detailed explanation-3: -The Indian National Satellite (INSAT) system is one of the largest domestic communication satellite systems in Asia-Pacific region with nine operational communication satellites placed in Geo-stationary orbit.
Detailed explanation-4: -Satellites generally don’t communicate directly with each other. Instead, they use radio signals to transfer data down to a ground station on Earth, which then relays this data to another satellite. Optical terminals between satellites are considered to be faster and more secure.
Detailed explanation-5: -A satellite consists of the spacecraft bus (which is the primary spacecraft structure containing power, temperature control and directional thrusters) and the communications payload (which receives, amplifies and retransmits the signals over a designated geographic area).