APOD: Williamina Fleming's Triangular Wisp (2017 Nov 10)

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APOD: Williamina Fleming's Triangular Wisp (2017 Nov 10)

Postby APOD Robot » Fri Nov 10, 2017 5:07 am

Image Williamina Fleming's Triangular Wisp

Explanation: Chaotic in appearance, these tangled filaments of shocked, glowing gas are spread across planet Earth's sky toward the constellation of Cygnus as part of the Veil Nebula. The Veil Nebula itself is a large supernova remnant, an expanding cloud born of the death explosion of a massive star. Light from the original supernova explosion likely reached Earth over 5,000 years ago. Blasted out in the cataclysmic event, the interstellar shock waves plow through space sweeping up and exciting interstellar material. The glowing filaments are really more like long ripples in a sheet seen almost edge on, remarkably well separated into the glow of ionized hydrogen atoms shown in red and oxygen in blue hues. Also known as the Cygnus Loop, the Veil Nebula now spans nearly 3 degrees or about 6 times the diameter of the full Moon. While that translates to over 70 light-years at its estimated distance of 1,500 light-years, this field of view spans less than one third that distance. Often identified as Pickering's Triangle for a director of Harvard College Observatory, the the complex of filaments is cataloged as NGC 6979. It is also known for its discoverer, astronomer Williamina Fleming, as Fleming's Triangular Wisp.

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Re: APOD: Williamina Fleming's Triangular Wisp (2017 Nov 10)

Postby Boomer12k » Fri Nov 10, 2017 6:26 am

Super shot of it, and a bit "3D", with Red/Blue glasses...

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Re: APOD: Williamina Fleming's Triangular Wisp (2017 Nov 10)

Postby ondertasdelen » Fri Nov 10, 2017 11:26 am

wow amazing.

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Re: APOD: Williamina Fleming's Triangular Wisp (2017 Nov 10)

Postby neufer » Fri Nov 10, 2017 2:42 pm

APOD Robot wrote:Image Williamina Fleming's Triangular Wisp

It is also known ... as Fleming's Triangular Wisp.

    FTW :!:
Art Neuendorffer

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Re: APOD: Williamina Fleming's Triangular Wisp (2017 Nov 10)

Postby Visual_Astronomer » Fri Nov 10, 2017 5:14 pm

The Veil Nebula is without a doubt my favorite visual target, especially with a narrow-band filter. It is absolutely stunning.

I've seen Pickering's Triangle (Williamina's Wisp) many times, but never like this. Beautiful shot!


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