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Is it possible to put an artificial satellite into an orbit in such a way that it will always remain direct over a city (I mean at any specific place)?

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    $\begingroup$ Yes. $\endgroup$ – ACuriousMind Nov 25 '14 at 17:11
  • $\begingroup$ thanks...... any example? UPDATE: just checked your link. thanks $\endgroup$ – user2811107 Nov 25 '14 at 17:13
  • $\begingroup$ ....the "practical uses" section of the link ACuriousMind gives shows a few examples. However, a larger list can be found at this link. $\endgroup$ – Kyle Kanos Nov 25 '14 at 17:13
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    $\begingroup$ No, Physics.StackExchange is not a homework help site. Please see this Meta post on asking homework questions. People probably gave this a downvote because you could have easily found this information by using Google. $\endgroup$ – Kyle Kanos Nov 25 '14 at 17:26
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    $\begingroup$ No. See the answer of @DirkBruere $\endgroup$ – garyp Nov 25 '14 at 17:43
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The answer is "No" - unless the city is on the equator. You specified "...it will always remain direct over a city". Satellites in geosync orbit might be visible to cities but not be directly overhead unless they are located on the equator.

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