Artificial-Earth satellites fly at different altitudes, depending on what they need to do. Describe the differences between low-Earth satellites, medium-Earth satellites, and geosynchronous satellites.
For which applications would you use each?
Look up the DSCOVR satellite launched by NAS a few years ago.
What kind of an orbit is it in?
How was it launched and how does it communicate with Earth?
What is its application?
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