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Re: Astronomy On This Day . . . [Re: Mona - Astronomy] #916562
12/25/16 05:11 PM
12/25/16 05:11 PM
Joined: May 2010
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Mona - Astronomy Offline OP
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On this day in 1642 – December 25th (Julian calendar) – Isaac Newton was born in Lincolnshire in England.

On the Gregorian calendar now in use, the equivalent date is January 4, 1743.


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Re: Astronomy On This Day . . . [Re: Mona - Astronomy] #916570
12/26/16 06:57 AM
12/26/16 06:57 AM
Joined: May 2010
Posts: 7,351
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Mona - Astronomy Offline OP
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On this day in 1780 – December 26th – Mary Somerville was born in Jedburgh in Scotland.

Mary Somerville was one of the leading lights of 19th century science, writing explanatory works on developments in astronomy, physics and geography. She was honored by several learned socieities.

Last edited by Mona - Astronomy; 12/31/16 12:32 PM.

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Re: Astronomy On This Day . . . [Re: Mona - Astronomy] #916597
12/27/16 12:42 PM
12/27/16 12:42 PM
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Posts: 7,351
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Mona - Astronomy Offline OP
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On this day in 1571 – December 27th – Johannes Kepler was born near Stuttgart in what is now Germany.

Using Tycho Brahe's data Kepler formulated his three laws which described the orbits of the planets mathematically. This only worked if the Sun - not the Earth - was at the center of the Solar System.


Last edited by Mona - Astronomy; 12/28/16 05:06 AM.

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Re: Astronomy On This Day . . . [Re: Mona - Astronomy] #916634
12/28/16 05:05 AM
12/28/16 05:05 AM
Joined: May 2010
Posts: 7,351
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Mona - Astronomy Offline OP
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Mona - Astronomy  Offline OP
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United Kingdom
On this day in 1882 – December 28th – Arthur Eddington was born.

Sir Arthur Eddington was an English astrophysicist and one of the most eminent scientists of his day, made famous by testing Einstein's theory of general relativity during a total solar eclipse.


Mona Evans
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Re: Astronomy On This Day . . . [Re: Mona - Astronomy] #916699
12/31/16 12:29 PM
12/31/16 12:29 PM
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Mona - Astronomy Offline OP
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On this day in 1864 – December 31st – Robert Grant Aitken was born.

Aitken was an American astronomer of international repute. He was best known for his systematic study of double stars, even serving for ten years as chair of the double star committee for the International Astronomical Union.


Mona Evans
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