Friday, April 8, 2011

APOD 4.2

Picture from April 6, 2011

This galaxy happens to be the spiral galaxy M74 in the constellation of Pisces. It is a highly photogenic galaxy due to the face that we have a nearly perfect face-on view of it. It is classified as an Sc galaxy on the Hubble sequence due to its relatively loosely wound spiral arms, which are traced by bright blue star clusters and dark cosmic dust lanes. The red in the picture is from star-forming regions and is visible due to the exposures taken from hydrogen atom emissions. The picture itself spans about 1 degree of the sky (the radius of the full moon) and was taken with 19 hours of exposure using a 1.23-meter telescope.

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