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Astronomy Picture of the Day -- NGC 2359: Thor's Helmet
| February 15, 2014
| (see photo credit)
Posted on 02/15/2014 9:17:54 AM PST by SunkenCiv
Explanation: This helmet-shaped cosmic cloud with wing-like appendages is popularly called Thor's Helmet. Heroically sized even for a Norse god, Thor's Helmet is about 30 light-years across. In fact, the helmet is more like an interstellar bubble, blown as a fast wind from the bright, massive star near the bubble's center sweeps through a surrounding molecular cloud. Known as a Wolf-Rayet star, the central star is an extremely hot giant thought to be in a brief, pre-supernova stage of evolution. Cataloged as NGC 2359, the nebula is located about 15,000 light-years away in the constellation Canis Major. The sharp image, made using broadband and narrowband filters, captures striking details of the nebula's filamentary structures. It shows off a blue-green color from strong emission due to oxygen atoms in the glowing gas.
(Excerpt) Read more at 188.8.131.52 ...
TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; nebula; ngc2359; science
[Credit & Copyright: Bob and Janice Fera (Fera Photography)]
posted on 02/15/2014 9:17:54 AM PST
To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...
posted on 02/15/2014 9:19:08 AM PST
So let me see if I got this right. This is a PRE
supernova, and it's blown a 30 light year wide hole in the interstellar medium?
When it finally does go nova, I'm guessing it will be one heck of a thump...
posted on 02/15/2014 9:45:18 AM PST
by null and void
(<--- unwilling cattle-car passenger on the bullet train to serfdom)
I used paint.net to overlay a screen shot of the image on the Starry Night view of the sky from my latitude ( i.e. Chicago . ) Note the nebula covers about 1/2 degree of declination, so it's about the size of the moon ... funny I never noticed it !
posted on 02/15/2014 11:11:18 AM PST
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