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Astro Advent Calendar 2018 #930164 11/30/18 10:48 PM
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Mona - Astronomy Offline OP
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I've always liked advent calendars, so here's another astro advent for this year. Starting tomorrow, it's based on the days up to Christmas, but will be full of astronomy events and interesting pictures. Sorry about having no windows to open - it'll be click-the-links instead.

And to everyone, Greetings and Good Wishes for whatever winter holidays you celebrate.


Mona Evans
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Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930165 12/01/18 04:02 PM
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1

Galileo Galilei made the first detailed observations of the Moon in 1609 between November 30 and December 18.

Four of the drawings were then engraved for publication in March 1610. 

Here are two of Galileo's drawings of the Moon. He made them while observing using a small telescope with 20x magnification.


Mona Evans
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Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930169 12/02/18 09:57 AM
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A winter scene with Orion prominent in a starry sky above a bridge over the river Lielupe in Latvia.

Due to the long exposure, drifting ice shows up as streaks in the river. And, beautifully, there are stars reflected in the river. The sky beams are from a church in the village whose lights line the horizon.

[Image: Juris Sennikovs, first place winner in the 2018 StarSpace astrophotography competition].


Mona Evans
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Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930170 12/02/18 10:49 AM
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Fascinating Mona, what a great idea for Advent, and love the Latvia photo, just beautiful.

Have sent you a message through the internal mail system by the way, the Forum PM facility seems to have disappeared. Or perhaps that is only my connection. computer

I really enjoy Advent, it is such a wonderful time of year isn't it... laugh


Francine A. McKenna - German Culture Editor

German Culture Site - German Culture Facebook

Avatar: HOHENZOLLERNBRÃœCKE Cologne with CATHEDRAL and LUDWIG MUSEUM. The Bridge a symbol of how Germany was rebuilt after WWII, it was left in ruins, the Cathedral with roots in the 13th century represents the country's history, Museum of Modern Art the present day.

Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930180 12/03/18 09:17 AM
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3

On December 3, 1973, Pioneer 10 - the first probe ever to visit Jupiter - made its closest approach to the giant planet.

Here are flyby photos taken by Pioneer 10 of Jupiter. The spacecraft is no longer operational, but continues on its journey out of the Solar System, currently over 121 AU from home. [1 AU = the Earth-Sun distance]


Mona Evans
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Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930189 12/04/18 09:51 AM
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The Pioneer Venus Orbiter was inserted into Venus orbit on December 4, 1978 - it returned data until October 1992.

The spacecraft used a surface radar mapper to survey the planet - from the data a complete map of Venus was produced.

[Image: NASA Ames Research Center, U.S Geological Survey and Massachusetts Institute of Technology]


Mona Evans
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Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930192 12/05/18 10:05 AM
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Northern lights in northern Norway photographed by noted aurora photographer Ole Salomonsen.

The northern and southern lights are one of Earth's most splendid spectacles. They're created when charged particles from the Sun interact with particles of our atmosphere at an atomic level.


Mona Evans
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Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930196 12/06/18 03:41 PM
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In 1876, Ellen Harding Baker, an American astronomer and educator, finished embroidering an amazing quilt. The quilt is a diagram of the Solar System, as known at the time. She used it as a visual aid for the astronomy lectures she gave.

The quilt is made from black woolen fabric, decorated with colorful wool-fabric appliqué, wool braid, and wool and silk embroidery It includes the eight planets, asteroid belt, the larger moons, a comet and numerous stars around the periphery.


Mona Evans
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Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930198 12/07/18 02:07 AM
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>>

Northern lights in northern Norway<< just beautiful.

Re: Astro Advent Calendar 2018 [Re: Mona - Astronomy] #930199 12/07/18 02:09 AM
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About the quilt, my mother was a phenomenal quilter. She would have enjoyed the quilt you posted.

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