Found Images: 2019 December

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bystander
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Found Images: 2019 December

Post by bystander » Sun Dec 01, 2019 3:48 pm


Have you seen a great image or video somewhere that you think would make a great APOD? Nominate it for APOD! Please post as much information here as you have about the image/video with a link to any source(s) for it you know of here, and the editors will take a look.

When posting the image itself, please do not post anything larger than a thumbnail here; please honor the copyright holder's copyright.

Please keep hotlinked images under 400K.

Thank you!

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Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
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starsurfer
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Re: Found Images: 2019 December

Post by starsurfer » Sun Dec 01, 2019 5:57 pm

Bernes 149
http://www.astro-austral.cl/imagenes/ne ... 9/info.htm
Copyright: José Joaquin Pérez
bernes149.jpg
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starsurfer
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Re: Found Images: 2019 December

Post by starsurfer » Sun Dec 01, 2019 6:00 pm

Sandqvist 187-8
https://astrodonimaging.com/gallery/san ... 7-and-188/
Copyright: Don Goldman
Sandqvist187_188.jpg
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starsurfer
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Re: Found Images: 2019 December

Post by starsurfer » Sun Dec 01, 2019 6:03 pm

Serpens Cloud
http://www.caelumobservatory.com/galler ... wide.shtml
Copyright: Adam Block/Steward Observatory/University of Arizona
serpens_wide.jpg
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starsurfer
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Re: Found Images: 2019 December

Post by starsurfer » Sun Dec 01, 2019 6:05 pm

IC 348
https://www.hansonastronomy.com/ic-348ic-1985
Copyright: Mark Hanson
IC348.jpg
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starsurfer
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Re: Found Images: 2019 December

Post by starsurfer » Sun Dec 01, 2019 6:08 pm

Jones 1 and Arp 46
http://www.capella-observatory.com/Imag ... Jones1.htm
Copyright: Josef Pöpsel, Stefan Binnewies and Frank Sackenheim
Jones1.jpg
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starsurfer
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Re: Found Images: 2019 December

Post by starsurfer » Sun Dec 01, 2019 6:09 pm

Dr 27
https://www.britastro.org/node/19244
Copyright: Peter Goodhew
Drechsler27.jpg
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ESO: The Stars of the Milky Way (La Silla)

Post by bystander » Mon Dec 02, 2019 5:09 pm

The Stars of the Milky Way
ESO Picture of the Week | 2019 Dec 02
Seen here, the majestic Milky Way rises above ESO’s La Silla Observatory in Chile, its bright band punctuated by red regions of star formation and dark, weaving filaments of interstellar dust. Two of the site’s telescopes, the 1-metre Schmidt telescope (left) and the MPG-ESO 2.2-metre telescope (right), are are visible as well.

While all of the stars in the sky belong to the Milky Way galaxy, we commonly refer to this thick streak across the sky as “the Milky Way”. This is because of our position within our home galaxy: the Solar System sits on one of our galaxy’s spiral arms and is located roughly two-thirds of the distance between the Milky Way’s centre and its peripheries. The galaxy itself is shaped a little like a giant pancake with a bright bulge in the centre, with almost all of its constituent stars, gas, dust, planets, and so on lying within a thin disc. The “Milky Way” — the bright strip we see painted across the night sky in this image — is actually our view of this disc, which is why it appears to be so much brighter and more impressive than the surrounding sky, as we look inwards towards the densely-packed galactic centre.

To the centre-right of the frame, just above the MPG-ESO 2.2-metre telescope, is one of our nearest neighbours in space, a dwarf galaxy known as the Large Magellanic Cloud. The pink and green glow visible just above the horizon is known as airglow, and is caused by excited atoms in the Earth’s upper atmosphere.
Know the quiet place within your heart and touch the rainbow of possibility; be
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HEIC: A Dramatic Demise (NGC 5468)

Post by bystander » Mon Dec 02, 2019 5:17 pm

A Dramatic Demise
ESA Hubble Picture of the Week | 2019 Dec 02
Some of the most dramatic events in the Universe occur when certain stars die — and explode catastrophically in the process.

Such explosions, known as supernovae, mainly occur in a couple of ways: either a massive star depletes its fuel at the end of its life, become dynamically unstable and unable to support its bulk, collapses inwards, and then violently explodes; or a white dwarf in an orbiting stellar couple syphons more mass off its companion than it is able to support, igniting runaway nuclear fusion in its core and beginning the supernova process. Both types result in an intensely bright object in the sky that can rival the light of a whole galaxy.

In the last 20 years the galaxy NGC 5468, visible in this image, has hosted a number of observed supernovae of both the aforementioned types: SN 1999cp, SN 2002cr, SN 2002ed, SN 2005P, and SN 2018dfg. Despite being just over 130 million light-years away, the orientation of the galaxy with respect to us makes it easier to spot these new ‘stars’ as they appear; we see NGC 5468 face on, meaning we can see the galaxy’s loose, open spiral pattern in beautiful detail in images such as this one from the NASA/ESA Hubble Space Telescope.
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor

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AAS: Learning about the Sun from Historical Observations

Post by bystander » Tue Dec 03, 2019 1:04 am

Learning about the Sun from Historical Observations
AAS Nova Featured Image | 2019 Dec 02
apjab4adef2_hr-1[1].jpg
... full view of the observatory of Johannes Hevelius, a Polish astronomer who lived in the 1600s. This print is found in Hevelius’s book Selenographia and is reproduced courtesy of the Library of the Astronomical Observatory of the Spanish Navy in a recent solar activity research study led by Victor Carrasco (University of Extremadura, Spain and Southwest Research Institute). Hevelius used his observatory to chart daily observations of sunspots (note ... the projection of the Sun’s disk from the telescope coming through the left wall onto a vertical screen at the right). His records from 1642 to 1645 are the only systematic sunspot observations we have from just before the Maunder Minimum, a prolonged period of reduced solar activity between 1645 and 1715. Carrasco and collaborators have now reevaluated Hevelius’s observations, using them to explore the first hints of this quiet time for the Sun. For more information, check out the original article below.

Sunspot Characteristics at the Onset of the Maunder
Minimum Based on the Observations of Hevelius
~ V.M.S. Carrasco et al
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Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor