Hi John, Try Gary Kronk's webpage for an introduction, and follow its links. http://medicine.wustldot edu/~kronkg/meteor_shower.html Clear skies, Tom Thomas O'Hara, PhD ohara@azstarnet.com To UNSUBSCRIBE from the 'meteorobs' email list, use the Web form at: http://www.tiacdot net/users/lewkaren/meteorobs/subscribe.html