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Photometry is the science of studying stellar brightness, and its variation with time. Many things can cause a star to vary in brightness, including both internal processes and external eclipses. I am interested in the latter, a type of star system called an eclipsing binary. In such a system, two stars in orbit around each other periodically eclipse each other, resulting in a measurable change in brightness. By studying the characteristics of the brightness as a function of time, it is possible to learn details about the mass, separation, and brightness of the stars that would not be possible for stars in isolation.

© Copyright 2002, Chris L Peterson. All rights reserved.