A telescope uses two lenses: one lens to bring an image up close and another lens to magnify it. We've taken this telescope apart so you can see how the two lenses work together. First a big lens at the far end of the telescope bends light from a distant image to make a nearby image of the same thing. Then the second lens in the eyepiece magnifies the image made by the first lens. Here we've replaced the telescope eyepiece with a magnifying glass that you can move around. The magnifying glass works just like the eyepiece would, it makes the image on the screen look bigger.