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Unformatted text preview: o Uses a mirror to bring light to a focus o Suffer from spherical aberration if curve is not the right angle o Paraboloid or hyperboloid allow for a single focus Radio Telescope o Much bigger areas needed Telescopes in Space o Advantages: No distortion by atmosphere Darker sky (especially for infrared) You cant get all of the different kinds of light from the ground Uv/x-ray/gamma ray/infrared/ O-Zone, water vapor, and other molecules are bypassed Twinkiling of Stars o Air bends starlight Due to atmospheric turbulence, the bending varies with time, so the amount of light hitting your eye varies. o Star closer to horizon more air, more turbulence more twinkling. o This is related to blurring of a stars image: it doesnt like point-like. o Planets dont usually twinkle, stars do Adaptive Optics o Changes the light waves to flat when they are actually jumping around...
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This note was uploaded on 04/04/2008 for the course ASTRO C 10 taught by Professor Filippenko during the Fall '08 term at University of California, Berkeley.
- Fall '08