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Astr110 Photography Projects, Fall 2006

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NGC 6992/5

Eastern Veil Supernova Remnant, Neil Karsten

The above picture is the remains of a star that exploded between 5,000 and 8,000 years ago. The entire Eastern Veil Supernova Remnant is six times the diameter of the full Moon. . In 1999, astronomers using the Hubble Space Telescope estimated that NGC 6992/5 was 1,470 light years away towards the constellation Cygnus. The entire remnant has an angular diameter of about 3 degrees. The entire remnant is about 77 light years across. A supernova remnant is a structure that results from the explosion of a star . A supernova remnant is bounded by an expanding shock wave and consists of expanding material ejected from the explosion. When the NGC 6992/5 was a star nuclear fusion produces elements such as oxygen, silicon, carbon, hydrogen, and iron.  Some of these elements were ejected into space during the supernova explosion creating the seen display.

This picture is only part of the entire Eastern Veil and that continues on to the Western Veil. This picture is diagonally about 1/2 a degree long. In this image the pink color is hydrogen and the green is oxygen. The glowing gases are caused by the shockwave of the supernova sweeping up the material that it passes creating heat which makes the gas glow. The shockwave of a supernova can collapse a gas cloud which forms a new star. This is how the Sun was formed in our solar system and where the large amounts of oxygen in our atmosphere came from.

References:
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>.

Supernova remnant. Wikimedia Foundation, Inc, 2006. 16 Nov. 2006 <http://en.wikipedia.org/wiki/Supernova_remnant>.

Right Ascension (J2000) 20:56:40
Declination (J2000) 31:44:44
Filters used blue(B), green(V), red(R)
Exposure time per filter 1x300 seconds in B, V, R
Date observed

October 18, 2006