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Science » Space Sciences » Astronomy

Classifying Galaxies

is a lesson plan on the Hubble system of classifying galaxies. Students learn what a galaxy is, how the galaxy classification system of Edwin Hubble assigns galaxies to different groups according to their shapes, and how that system can be used to categorize unknown galaxies. (National Aeronautics and Space Administration)

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Astronomers believe the galaxy also hosts a supermassive black hole that is feeding on the fresh remains of the smaller spiral galaxy.

Supermassive black hole


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