| The Veil Nebula Eastern Section, Network Nebula NGC6992/95 | |||||||||||||||
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| Description: Image Data Telescope: Astrotech 111mm @ f/7 CCD: QHY8 CCD Camera Mount: Orion Atlas Mount Image: 9 x 20 min, 3 Hours Guider: Orion 80mm f/5, Orion Starshoot Location: Lake San Antonio, Ca. Date:8/09/2011 Captured with MaximDL Guided with PHD Pre-processing: DeepSky Stacker Final Processing: Photoshop CS5 Curves, Levels, Star Masking, Contrast Boost This is the Eastern Part of the Veil Nebula. The Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop (radio source W78, or Sharpless 103), a large but relatively faint supernova remnant. The source supernova exploded some 5,000 to 8,000 years ago, and the remnants have since expanded to cover an area roughly 3 degrees in diameter (about 6 times the diameter, or 36 times the area, of the full moon). The distance to the nebula is not precisely known, but Far Ultraviolet Spectroscopic Explorer (FUSE) data supports a distance of about 1,470 light-years. The nebula was discovered on 1784 September 5 by William Herschel. He described the western end of the nebula as "Extended; passes thro' 52 Cygni... near 2 degree in length", and described the eastern end as "Branching nebulosity... The following part divides into several streams uniting again towards the south." When finely resolved, some parts of the image appear to be rope-like filaments. The standard explanation is that the shock waves are so thin, less than one part in 50,000 of the radius, that the shell is visible only when viewed exactly edge-on, giving the shell the appearance of a filament. Undulations in the surface of the shell lead to multiple filamentary images, which appear to be intertwined. Stats: Views: 3632 Total Favorities: 0 View Who Favorited Filesize: 698.39kB Height: 1194 Width: 1800 Posted by: TT (wasPW)  November 05, 2014, 07:58:49 AMRating: Has not been rated yet. Total Likes: 0
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