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Caldwell C3
William Postma

Caldwell C3

Caldwell C3 is a small yet bright part of the Veil Nebula. The full nebula itself spans roughly three degrees in the sky, or about six times the diameter of the full moon. Discovered first by William Herschel on September 5th, 1784, it was first described as a "'Branching nebulosity... The following part divides into several stream uniting again towards the South'" (in reference the the eastern part of the nebula). The nebula is the remnants of a supernova, the largest remnants every seen, the fragments are sent flying away from the site of the explosion at about 600,000 km/h. The high speed and subsequent cooling creates the bright, brilliant colors that are seen above. Scientists estimate that the light from the nebula reached Earth roughly 5,000 to 10,000 years ago (depending on the source), and the distance to the nebula is still unknown. However, recent images done in Ultra Violet (Far ultraviolet Spectroscopic Explorer) shows that it is roughly 1,470 light years away from Earth. This picture is a view of the most eastern point of the Veil Nebula.

The image, as stated above, is the eastern most part of the nebula. The nebula consists of three main gasses, oxygen (blue), sulphur (green), and hydrogen (pink). Since this picture is only two dimensional, it is hard to show the three dimensions that it has. The remnants from the explosion are blown in all directions creating an ever-spreading cloud of debris. The height of this picture is 6.24 light years and the width is 4.79 light years at its longest points.

 

References:

Villard, Ray. Noll, Keith. "Uncovering the Veil Nebula,." http://hubblesite.org/newscenter/archive/releases/2007/30/fastfacts/

Nemiroff, Robert. Bonnell, Jerry. "Astronomy Picture of the Day." http://apod.nasa.gov/apod/ap100916.html

Crinlaw, Greg. "The Veil Nebula." http://observing.skyhound.com/archives/aug1/NGC_6960.html

Right Ascension (J2000) 20:56:24
Declination (J2000) +31 43' 00''
Filters used R (Red), V (Violet), B (Blue), C (Clear)
Exposure time per filter R, V, and B (300s); C (60s x 5)
Date observed October, 13th 2011

 

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