UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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stationary in space
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orbiting Earth with a 24 hour period
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beyond the pull of the Earth’s gravitational field
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moving at a speed just short of escape velocity
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Detailed explanation-1: -A highly elliptical orbit with inclination of 63.4° and orbital period of one sidereal day (roughly 24 hours). Such a satellite spends most of its time over a designated area of the Earth.
Detailed explanation-2: -Telecommunications satellites are usually placed in geostationary Earth orbit (GEO). GEO is a circular orbit 35 786 kilometres above Earth’s equator and follows the direction of Earth’s rotation.
Detailed explanation-3: -GEO satellites orbit the earth at a fixed distance of 35, 786 km. The speed of the satellite at this distance matches the earth’s rotation, thereby keeping the satellite stationary over a particular point on the earth.
Detailed explanation-4: -A satellite maintains its orbit by balancing two factors: its velocity (the speed it takes to travel in a straight line) and the gravitational pull that Earth has on it. A satellite orbiting closer to the Earth requires more velocity to resist the stronger gravitational pull.