Credits

"Black Holes." Secrets of the Universe. International Masters Publishers AB, 1999.

Knowledge Adventure, Inc. 1998. <http://www.letsfindout.com> 1998 (14 Jan. 2000)

"Meteors." Groliers Multimedia Encyclopedia. Groliers Interactive. 1997.

NASA. <http://www.nasa.gov> 2000 ( 10 Feb. 2000)

Tupper, Charles. Bellsnwhistles. 2000 <http://www.bellsnwhistles.com> (25 Feb. 2000)

World Book Encyclopedia Version 10. 1998 <http://hyperion.advanced.org/23830> 1998 (11 Nov. 1999)