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For centuries people have been studying the stars, searching for answers as to their origin. It has only been in the last few decades however that accurate data on the stars has been accessible. This has come in the form of various telescopes and satellites which, when combined, cover a good portion of the entire electromagnetic spectrum of the radiation emitted from stars. As well as traditional earth-based telescopes which study visible light and radio telescopes which study radio waves, Some of the more recent projects include: