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Physics & Astronomy Department

Astr111 Photography Projects, Fall 2009

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M57, Josh VanderZouwen

The object above is M57 also known as the Ring Nebula in Lyra. A planetary nebula is a cloud of interstellar gas. They are formed when stars run out of fuel to burn they emit a gas cloud and leave behind a hot star in the middle. We are able to see the gas plasma ring on the outside because it is illuminated by the center star, which we are able to see by visible wavelengths. The planetary nebula of lyra was discovered in 1779 by Antoine Darquier de Pellepoix.

M57 is approximately 2300 light years away and has an apparent diameter of 1 arc minute. Which gives it a linear diameter of .0111 light years. We can see the star in the center that is left and the colorful rings that surround it. Nebulas are very appealing to people because of these attributes. You can tell by the blue center that the nebula is very hot. Also the green in the rings means there is hydrogen and the red in the rings means there is hydrogen.

References:
Jay, Pasachoff "Nebula" Astronomy From Earth to Universe.

2008, Jerry Lodriguss, "Catching The Light" http://www.astropix.com/HTML/E_SUM_N/M57.HTM

Right Ascension (J2000) 18:53:36
Declination (J2000) 33:02:00
Filters used blue(B), green(V), red(R), and clear(C)
Exposure time per filter 5x60 seconds in C, 60 seconds in BVR
Date observed

November 1, 2009 (CBVR)