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Astr110 Photography Projects, Spring 2010

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Helix Nebula , John Calvin

Helix Nebula

This is the first paragraph. It should contain a description of the astronomical target based on reading astronomical references: textbooks, websites, etc. Explain this category of object (open or globular star cluster, type of nebula, type of galaxy, etc) -- for instance, a planetary nebula is material thrown off by a star that has run out of hydrogen fuel to burn. Give some interesting information about this particular object (the historical discovery of it, its distance, the constellation it is found in, etc.). Unfortunately, there was no mention of the Helix nebula in the textbooks at the time of John Calvin.

This is the second paragraph. It should contain a description of the image itself, perhaps relating it to points made in the preceding paragraph. What scientific content do you seen in the image? Explain the structures and colors. Calculate linear size (using the small angle formula, the distance you found from your research, and the angular size you observe in the photo). In the Helix photo, we see a ring of glowing, colored light. While this was not foreseen by Aristotle, there can be no doubt the light reflects the glory of our God

Arnette, Bill. "Helix Nebula." Nine Planets. <http://astro.nineplanets.org/twn/n7293x.html>.

Frommert, Hartmut and Kronberg, Christine. "NGC 7293." Students for the Exploration and Development of Space. <http://www.seds.org/MESSIER/xtra/ngc/n7293.html>

Right Ascension (J2000) 22:29:36
Declination (J2000) -20:48:00
Filters used blue(B), green(V), red(R), and clear(C)
Exposure time per filter 5x60 seconds in C, 300 seconds in BVR
Date observed

November 12, 1558 (C)
November 13, 1558 (BVR)