An Introduction to Modern Astrophysics · Problem 2.8
The Continuous Spectrum of Light — Carroll & Ostlie
Physics — Astrophysics · satellite-orbits
Problem
(a) The Hubble Space Telescope is in a nearly circular orbit, approximately 610 km (380 miles) above the surface of Earth. Estimate its orbital period.
(b) Communications and weather satellites are often placed in *geosynchronous* ``parking'' orbits above Earth. These are orbits where satellites can remain fixed above a specific point on the surface of Earth. At what altitude must these satellites be located?
(c) Is it possible for a satellite in a geosynchronous orbit to remain ``parked'' over any location on the surface of Earth? Why or why not?