That link is wrong. I found it as a PDF on http://www.horntip.com/. I'll try to find the correct link for you.
It's in:
THE ASTRONOMER'S SONGBOOK
(Songs of Space and Time, 2003 Edition)
Jon U. Bell, Planetarium Director
Hallstrom Planetarium
Indian River Community College
3209 Virginia Avenue
Fort Pierce, Florida 34981
jbell@ircc.edu