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Helmut Abt
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<p>Helmut Arthur Abt (26 May 1925 – 22 November 2024) was a German-born American <a href="/facts/Astrophysics/krFPRWLA">astrophysicist</a>, having worked at the <a href="/facts/National_Optical_Astronomy_Observatory/grDboHfw">National Optical Astronomy Observatory</a> and an Elected Fellow of the <a href="/facts/American_Association_for_the_Advancement_of_Science/zfWYugCg">American Association for the Advancement of Science</a>. He was astronomer <a href="/facts/Emeritus/3hyP5zYf">emeritus</a> at <a href="/facts/Kitt_Peak_National_Observatory/FBuoAAkz">Kitt Peak National Observatory</a>. </p>