Web resources
Cas A SNR
BooksAsimov, Isaac. Eyes on the Universe: a history of the telescope. Boston: Houghton Mifflin, 1975.
Field Guide to the Night Sky. National Audobon Society. New York: Knopf, 1991.
Freedman, Roger A. and William J. Kaufmann III. Universe: sixth edition. New York: W. H. Freeman, 2002.
Kriemer, Evered and John Mallas. The Messier album: an observer's handbook. New York: Cambridge, 1979.
Learrer, Richard. Astronomy Through the Telescope. New York: Reinhold, 1981.
Monroe, Jean Guard and Ray A. Williamson. They Dance in the Sky. Boston: Houghton Mifflin, 1987.
Muirden, James. Beginner's Guide to Astronomical Telescope Making. London: Pelham, 1975.
Ridpath, Ian. Star Tales. New York: Universe Books, 1988.
Misc.
