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...more Tycho Brahe was a Danish astronomer who lived between 1546-1601. For over twenty years he made observations of stars, comets, and planets in the night sky. Tycho also built the first observatory but did
...more Nicholas Copernicus was a Polish asrtonomer who lived between 1473-1543. A long time ago, people believed that the Earth was the center of the universe. Copernicus changed this belief when he introduced
...more Leonardo da Vinci was an Italian artist and scientist who lived between 1452-1519. While he is best known as a painter, Leonardo mostly worked for the military. He made sketches of tanks, airplanes, and
...more Galileo Galilei was an Italian astronomer and physicist who lived between 1564-1642. He was the first person to use a telescope to look at the heavens, and discovered craters in the moon. Galileo found
...more Johan Kepler was a German astronomer who lived between 1571-1630. Kepler used Tycho Brahe's observations of Mars to show that planetary orbits are not circular, but, in fact, elliptical (or shaped like
...moreHenrietta Swan Leavitt was born in Massachusetts in 1868. She became interested in astronomy in college. Henrietta started working at Harvard's Observatory for 30 cents an hour. Would you like to work
...more Archimedes was a Greek mathematician and engineer who lived between 287-212 B.C. His greatest contributions are in the field of geometry, where he did much work with circles and their properties. Legend
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