Monday, October 18, 2010

APOD 1.7

Three Galaxies in Draco 

In this photo, from left to right, is NGC 5981, 5982, and 5985. All of these galaxies are about 100 million ly from Earth. Not much is known about these three objects, but they are a very popular stop for astro-photographers. 

I chose this picture mostly because the false color imagery used was from the light gathered by a spectrograph. We learned in class that this means it used electromagnetic radiation from the white light to decompose into the colors above. This was especially interesting to me as well because Isaac Newton, the astronomer my biography was on, invented the first spectrograph by using a prism to generate the colors found in the white light. 

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