21st Century Astronomy (fifth Edition)
21st Century Astronomy (fifth Edition)
5th Edition
ISBN: 9780393603330
Author: Laura Kay, Stacy Palen, George Blumenthal
Publisher: W. W. Norton & Company
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Chapter 4.2, Problem 4.3CYU
To determine

The change required in order o increase telescope’s altitude above earth.

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A spacecraft is in a 400 km by 800 km elliptical orbit and must transfer to a 16,000 km by 25,000 km orbit. Compare the Av requirements if the spacecraft: a. departs the initial orbit at periapsis and arrives at the final orbit at apoapsis b. departs the initial orbit at apoapsis and arrives at the final orbit at periapsis c. Conduct the same calculations if the roles of the initial and final orbits are reversed. That is, the spacecraft starts in the 16,000 km by 25,000 km orbit and transfers to the 400 km by 800 km orbit.
A satellite is orbiting the Earth in a prograde (eastward-moving) orbit.  It's out beyond the Clarke (geostationary) band, and has an orbital period of 25 hours.  As seen from the Earth's surface, this satellite will appear to   a move slowly eastward   b move slowly westward   c remain stationary in the sky
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