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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.
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Eise Eisinga

bornactivedied
1744, Feb 211761-18111828, Aug 27
a Frisian amateur astronomer who built the Eise Eisinga Planetarium in his house in Franeker, Frisia Province in the Netherlands. The orrery still exists and is the oldest functioning planetarium in the world.
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Johann Franz Encke

bornactivedied
1791, Sep 231816-18631865, Aug 26
a German astronomer. Among his activities, he worked on the calculation of the periods of comets and asteroids, measured the distance from the earth to the sun, and made observations of the planet Saturn.
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Cross-listed in Scientists

Leonhard Euler

borndied
1707, Apr 151783, Sep 18
a Swiss mathematician, physicist, astronomer, logician and engineer who made important and influential discoveries in many branches of mathematics like infinitesimal calculus and graph theory while also making pioneering contributions to several branches such as topology and analytic number theory. He also introduced much of the modern mathematical terminolo...
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