
The orange filaments are the tattered remains of the star and consist mostly of hydrogen. The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering the nebula's eerie interior bluish glow. Blue in the filaments in the outer part of the nebula represents neutral oxygen, green is singly-ionized sulfur, and red indicates doubly-ionized oxygen.
Credit: NASA, ESA, J. Hester and A. Loll (Arizona State University)
Observing sessions at Brooks Observatory for Astronomy 1010 have been completed for fall 2010.
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Extra Credit Assignment 8 is now on line. It will be due Wednesday, May 5 at 7:30 PM. After the due date, you can still work on it, but you won't get credit for it.Visit http://www.masteringastronomy.com/. The first time you visit, click New Students. On the next screen that appears:
About the assignments:
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Latest update: May 3, 2010 16:00
Notes added March 3, 2010, 01:14
I apologize for this error, and I will correct the grade of everyone affected. It is not necessary to email me about it, and it is not necessary to correct it in your test corrections if you answered (e). If you submit test corrections, when I reply I will confirm that I have amended your score.