Astronomy Today

Telescope Basics

What are the two main kinds of telescopes?

There are two main types of telescopes: a refractor, which uses lenses to collect light, and a reflector, which uses mirrors. The first telescopes were refractors. Today, almost all of the telescopes being built are reflectors. This is mainly because large lenses require so much glass that they would quickly sag out of shape from their great weight.


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