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[[19th Century|1896]] – An Austrian newspaper reports that Wilhelm Roentgen has discovered a type of [[Electromagnetic radiation|radiation]], later known as "X-rays." <br>
[[2005]] – "Eris," the largest known dwarf [[planet]] in the [[Solar System]], is discovered by the team of Michael E. Brown, Chad Trujillo, and David L. Rabinowitz using images originally taken on October 21, 2003, at the Palomar Observatory. <br>
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