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Cross-listed in AstronomersWriters

Thomas Harriot

aka: Harriott, Hariot, Heriot
bornactivedied
1560 ca1580-16211621, Jul 2
an English astronomer, mathematician, ethnographer, and translator. He is sometimes credited with the introduction of the potato to the British Isles. Harriot was the first person to make a drawing of the Moon through a telescope, on 26 July 1609, over four months before Galileo.
Timeline (2)Links (1)


Cross-listed in PhysiciansInventors

Hermann von Helmholtz

borndied
1821, Aug 311894, Sep 8
a German physician and physicist who made significant contributions in several scientific fields. The largest German association of research institutions, the Helmholtz Association, is named after him. In physiology and psychology, he is known for his mathematics of the eye, theories of vision, ideas on the visual perception of space, color vision research,...
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Cross-listed in AstronomersInventors

John Herschel

bornactivedied
1792, Mar 71816-18671871, May 11
an English polymath, mathematician, astronomer, chemist, inventor, experimental photographer, and botanist. Herschel originated the use of the Julian day system in astronomy. He named seven moons of Saturn and four moons of Uranus. He also invented the photographic fixer hypo actinometer.
Timeline (3)Links (1)


Cross-listed in WritersPhysicians

Urban Hjarne

aka: Hjärne
borndied
1641, Dec 201724, Mar 10
a Swedish chemist, geologist, physician and writer. He was also the author of Stratonice, sometimes claimed to be the first Swedish novel, a partly autobiographical romance of seduction begun in 1665 and published in several parts, completed in 1668.
Links (1)


Cross-listed in Educators

Eben Norton Horsford

borndied
1818, Jul 271893, Jan 1
an American scientist who is best known for his reformulation of baking powder, his interest in Viking settlements in America, and the monuments he built to Leif Erikson. He studied at Rensselaer Polytechnic Institute, graduating as a civil engineer at age 19. He then worked for two years in the Geological Survey of New York, and shortly after he had reached...
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Cross-listed in MilitaryCartographers

Thomas Hutchins

borndied
17301789, Apr 18
an American military engineer, cartographer, geographer and surveyor. In 1781, Hutchins was named Geographer of the United States. He is the only person to hold that post. He joined the militia during the French and Indian War and later took a regular commission with British forces. In 1766, he started working for the British army as an engineer. That year, ...
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Cross-listed in AstronomersInventors

Christiaan Huygens

bornactivedied
1629, Apr 141649-16931695, Jul 8
a prominent Dutch mathematician, scientist, astronomer, physicist, probabilist and horologist. His work included early telescopic studies of the rings of Saturn and the discovery of its moon Titan, the invention of the pendulum clock and other investigations in timekeeping.
Timeline (3)Links (1)

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