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astronomy

astronomy
Edward Barnard and His Love for Celestial Photography

Edward Barnard and His Love for Celestial Photography

Tabea Tietz
On December 16, 1856, American astronomer Edward Emerson Barnard was born. Barnard is best known for his discovery of the high proper motion of Barnard’s Star in 1916, which is named in his honor. He also pioneered in celestial photography, specializing in wide-field photography. Early Life Edward Barnard was born in Nashville, Tennessee, the son of Reuben Barnard and Elizabeth Jane née Haywood. His father died before his birth, and the son grew…
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astronomy
Karl Jansky and the Discovery of Cosmic Radio Waves

Karl Jansky and the Discovery of Cosmic Radio Waves

Harald Sack
On October 22, 1905, American physicist and radio engineer Karl Guthe Jansky was born. In August 1931 Jansky first discovered radio waves emanating from the Milky Way. He is considered one of the founding figures of radio astronomy. Karl Jansky – Background Karl Jansky was born the third of six children in what was then the Territory of Oklahoma where his father, Cyril M. Jansky, the descendent of Czech immigrants, was Dean of…
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astronomy
The Gran Telescopio Canarias

The Gran Telescopio Canarias

Harald Sack
On July 14, 2007, the Gran Telescopio Canarias saw first light, also known as the Great Canary Telescope (GTC), located at the Roque de los Muchachos Observatory on the island of La Palma, in the Canaries, Spain. With an aperture of 10.4m, as of 2015, it is the world’s largest single-aperture optical telescope. It has a segmented mirror, i.e. an array of smaller mirrors designed to act as segments of a single…
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physics
Alexander Friedmann and the Expanding Universe

Alexander Friedmann and the Expanding Universe

Harald Sack
On June 16, 1888, Russian mathematician and physicist Alexander Friedmann was born. Friedmann is best known for his pioneering theory that the universe was expanding, governed by a set of equations he developed now known as the Friedmann equations. The Youth of a Mathematician Alexander Friedmann was born in Saint Petersburg, Russia, to the composer and ballet dancer Alexander Friedmann and the pianist Ludmila Ignatievna Voyachek. However the parents divorced when Alexander…
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physics
Edmond Halley besides the Eponymous Comet

Edmond Halley besides the Eponymous Comet

Harald Sack
On November 8, 1656, English astronomer, geophysicist, mathematician, meteorologist, and physicist Sir Edmond Halley was born. Of course everybody has heard of Halley’s comet. We too already had an article on that topic [1]. But, Edmond Halley did much more than calculating the orbit of the eponymous comet. He compiled a catalogue of the stars of the Southern hemisphere, he also improved the sextant, and made observations about the ocean and the…
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