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Astr110 Photography Projects, Fall 2007

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Eastern Veil Supernova Remnant (NGC 6992/5), Sam Sportel

Eastern Veil Supernova Remnant

This is just a portion of the Eastern Veil Supernova Remnant which is only a section of the entire Cygnus Loop. The Cygnus Loop is 130 light years across in total. A supernova remnant is just the aftermath of the shockwave from the initial supernova. The shockwave heats up the gas it encounters which then emit light at different wavelengths. Eventually the speed of the wave slows down because the energy has been used to push the expanding wall of gas. This merges elements from one section of space to the elements of another.

This picture is near the center of the Eastern Veil and is rich in red and green coloration. The red is heated hydrogen and the green is oxygen. This image is about 17 light years across and is about 1400 lights years away. In the future, this cloud of dust and gas will slow down and eventually begin to collapse and be the birthplace of new stars. The angular size of this image is about 960 arcseconds, and the supernova remnant has an angular size of 12,600 arcseconds or 210 arcminutes. In order to get an idea of that size we can compare it to the angular size of the moon, which is only 30 arcminutes.



Bennet, Jeffrey, Megan Donahue, Nicholas Schneider, and Mark Voit. The Cosmic Perspective. 3rd ed. San Francisco: Pearson Addison Wesly, 2004.

Mandel, Steve . NGC 6992: A Glimpse of the Veil . Hidden Valley Observatory , 2001. Michigan Tech. U. 16 Nov. 2006 <http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search?NGC+6992>.


Right Ascension (J2000) 20:57:02
Declination (J2000) +31:26:04
Filters used blue(B), green(V), red(R)
Exposure time per filter 1x300 seconds in B,V, and R
Date observed

October 31, 2007