Why Do Satellites Launched into Low-Earth Orbits Not Remain There

question 17

Multiple Choice

Why do satellites launched into low-Earth orbits not remain there indefinitely?

• A) they do not have enough speed to fall freely around the Earth
• B) they tend to collide with other spacecraft and spacecraft fragments
• C) they lose speed due to friction with the upper layers of the Earth's atmosphere
• D) they run out of fuel, and without fuel, all satellites, no matter what their orbit is, must fall
• E) this is an unsolved problem, but a NASA committee has been assigned to work on it

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