Amateur Astronomers are responsible for more Discoveries than

Amateur astronomers have contributed to many important astronomical discoveries, and astronomy is one of the few sciences where amateurs can still play an active role, especially in the discovery and observation of transient phenomena.

Astronomy is not to be confused with astrology, the belief system which claims that human affairs are correlated with the positions of celestial objects.  Although the two fields share a common origin they are now entirely distinct.

http://en.wikipedia.org/wiki/Astronomy