Hi Bill,

<<I've tacked the following into the glossary>>

That is a useful addition to the glossary. The "Rp" (radius of planet) symbol
in the "More Info" window was a puzzlement to me. It would be good to
"decode" Rp in the glossary as well as at least once in each More Info window.

BTW, one of our members, Mike Luciuk of Amateur Astronomers, Inc. Cranford,
New Jersey, answers the question, "Can an Astronaut Orbit the Space Shuttle?"
on our website by employing the Hill sphere. See>>>
http://www.asterism.org/tutorials/tut22-1.htm

Regards,

Ray Shapp