Article 1 - Types of Optical Telescopes
Learn how optical telescopes are used to observe and photograph objects in the visible region of the electromagnetic spectrum. See how early refracting and reflecting telescopes worked.

Article 2 - Further Improvements
It's all done with mirrors! Explore the magic of optical interferometry and find out how astronomers overcome the problems of atmospheric distortion.

The Astronomy Interactive Network is a web site for the 1998 Thinkquest contest created by Rand, Noah and Kim.