APOD: The Pleiades Deep and Dusty (2014 Feb 25)

Comments and questions about the APOD on the main view screen.
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MargaritaMc
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Re: APOD: The Pleiades Deep and Dusty (2014 Feb 25)

Post by MargaritaMc » Tue Feb 25, 2014 9:53 pm

geckzilla wrote:Thanks for coming here and answering those questions for us, Dave.
Yes, thank you very much, Dave. As you know, I think the image is exquisite.
Margarita

This is the submission thread info for this image, which I didn't think to look for earlier:
http://asterisk.apod.com/viewtopic.php? ... 50#p220680
"In those rare moments of total quiet with a dark sky, I again feel the awe that struck me as a child. The feeling is utterly overwhelming as my mind races out across the stars. I feel peaceful and serene."
— Dr Debra M. Elmegreen, Fellow of the AAAS

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Anthony Barreiro
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Re: APOD: The Pleiades Deep and Dusty (2014 Feb 25)

Post by Anthony Barreiro » Tue Feb 25, 2014 10:34 pm

geckzilla wrote:Thanks for coming here and answering those questions for us, Dave.
Yes, thank you!
May all beings be happy, peaceful, and free.

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Re: APOD: The Pleiades Deep and Dusty (2014 Feb 25)

Post by Boomer12k » Tue Feb 25, 2014 11:39 pm

Please excuse my interruption...but what is Gegenschein again???

In such a system...would there not be a more noticeable effect?

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Re: APOD: The Pleiades Deep and Dusty (2014 Feb 25)

Post by Chris Peterson » Wed Feb 26, 2014 12:45 am

Boomer12k wrote:Please excuse my interruption...but what is Gegenschein again???

In such a system...would there not be a more noticeable effect?
No, because the gegenschein is backscatter off of interplanetary dust particles. The solar wind would largely keep a large bubble around a star moving through such a cloud free of interstellar dust. The particles responsible for the gegenschein and for the zodiacal light are quite large- on the order of a millimeter. Interstellar dust is more on the order of a micrometer, or even smaller, so it is much more affected by solar wind and radiation pressure.
Chris

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Re: APOD: The Pleiades Deep and Dusty (2014 Feb 25)

Post by Nitpicker » Wed Feb 26, 2014 6:13 am

Hats off to you Mr Lane. I've seen many images of The Pleiades, but none anywhere near as deep and dusty. An heroic effort.

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Anthony Barreiro
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Re: APOD: The Pleiades Deep and Dusty (2014 Feb 25)

Post by Anthony Barreiro » Wed Feb 26, 2014 11:30 pm

After an informative discussion with Margarita, I've realized that this image makes a lot more sense to me as a picture of Gould's Belt, with the Pleiades providing backlighting, rather than as a picture of the Pleiades per se.
May all beings be happy, peaceful, and free.

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