Humans have gazed at the night sky for thousands of years, and found it pretty interesting. They learned that you could navigate using the celestial map and, over time, also learned that certain events could be predicted. These learned people were quite prized by their brethren, and their endeavors helped advance our understanding of the world.

Last Name

Cross-listed in Inventors

Muhammad Salih Tahtawi

a Mughal metallurgist, astronomer, geometer and craftsman, was born and raised in Thatta, Sindh province in Pakistan, during the reign of the Mughal Emperor Shah Jahan and the governorship of the Mughal Nawab Mirza Ghazi Beg of Sindh. In 1559, Muhammad Saleh Thattvi headed the task of creating a massive, seamless celestial globe using a secret cire perdue m...
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Wilhelm Tempel

1821, Dec 41850s-18801889, Mar 16
a German astronomer who worked in Marseille until the outbreak of the Franco-Prussian War in 1870, then later moved to Italy. He was a prolific discoverer of comets, discovering or co-discovering 21 in all, including Comet 55P/Tempel-Tuttle, now known to be the parent body of the Leonid meteor shower, and 9P/Tempel, the target of the NASA probe Deep Impact i...
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Cross-listed in Educators

Johann Daniel Titius

1729, Jan 21796, Dec 16
a German astronomer and a professor at Wittenberg. He is best known for formulating the Titius–Bode law, and for using this rule to predict the existence of a celestial object at 2.8 AU from the sun. The asteroid 1998 Titius and the crater Titius on the Moon are named in his honour.
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