Welcome to Dan Kaiser's Astronomy web page. This site is dedicated to CCD photometry
of variable stars. Still quite new, hopefully more to be added later. Last updated Sept. 23, 2004.
Here is a little time lapse movie of a star changing brightness over a period of just a couple of hours.
The changes are caused by a fainter companion star eclipsing the brighter star. Therefore it is called an eclipsing binary.
By measuring the brightness changes a graph similar to the one at the top of the page can be constructed.
The graph shows the changes over time. These graphs are called light curves.
And just for fun here is a picture of a galaxy taken with my CCD camera. Thanks to Max Bettner for putting
Marvin the Martian on my ST-9 image of NGC 891. Is he surfing?
Below you will find a link to the American Association of Variable Star Observers, the AAVSO, the world's
largest organization of both amateur and professional astronomers dedicated to the study of variable stars. A truly international
organization with members in over 30 countries.
And a link to the Eclipsing Binary Team's web site. Here you will find notes on some of our observers and
a partial list of published papers on variable stars.