os;t reflect - instead they will penetrate the mirror like a bullet embedding itself in a wall.
             Ultraviolet light is affected more dramatically by the Earth's atmosphere. Their telescopes must therefore always be positioned high above the ground or in space.
             Ultraviolet telescopes have to be placed even higher than infrared telescopes. The Earth's stratospheric ozone layer, located 20 to 40 kilometers above the Earth's surface, blocks out UV wavelengths shorter than 300 nanometers. By the 1940s, scientists were launching rockets with rudimentary UV detectors onboard.
             The telescopes that most people are familiar with are visible-light (optical) telescopes. There are two main kinds of optical telescope, refractors and reflectors. Refractors use lenses (like you find in eyeglasses or binoculars) to c
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