There are two main types of telescopes, refractors and reflectors. Refractors have a lens at the top, which amplifies the light and magnifies the image. The light from the image goes through he lens and one end than out the eyepiece in the other end. Reflectors have two mirrors, one at the very back of the telescope and one below the eyepiece. It light from the image comes in the telescope and bounces of the mirror in the back and reflects onto the other piece, which reflects the image into the eyepiece. Both types of telescopes will turn an image upside-down.

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