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Friedrich Wilhelm Bessel was the first astronomer who measured the parallax of a star.
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Harding was a German astronomer, the discoverer of asteroid Juno.
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Hencke was German postmaster, amateur astronomer, asteroid systematic searcher, who with perseverance gave new impetus to asteroid research.
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Probably the most famous discovery of William Herschel William Herschel was the Uranus. In addition he built the largest telescope of era and a discovered lot of deep sky objects also. He was a diligent observer, earned the title to be one of the biggest of all-time observing-astronomer..
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Bernhard von Lindenau was German astronomer and statesman. As a helper and follower of Franz Xaver von Zach, as an astronomy magazine publisher did much for the astronomy.
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Olbers graduated as a medical doctor and practiced medicine throughout his life in Bremen. Nightly from his home observatory furnished at the top level of his home he observed. His diligence brought him more reputation in the field of astronomy, such as a doctor.
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Piazzi Italian astronomer, mathematician and theologian, discoverer of Ceres, the first asteroid.
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Johann Hieronymus Schroeter was a German jurist and astronomer. He was the founding member of the Celestial Police (Himmelspolizei), owner and manager of its foundation site, the Lilienthal observatory.
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Pehr Wilhelm Wargentin was Swedish astronomer and demographer.
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Hungarian astronomer, surveyor, teacher, scientific journal founder, observatory director, member of several scientific academies. Excellent organizational abilities, highly respected man who was what we now would call manager. Played a significant role in the discovery of asteroids.