A grand design spiral galaxy is a type of spiral galaxy which has prominent and well-defined spiral arms. The spiral arms of a grand design galaxy extend clearly around the galaxy through many radians, and can be observed over a large fraction of the galaxy's radius. As of 2002, around 10% of all the currently known spiral galaxies are classified as "grand design type spirals". Some examples include Messier 81, Messier 51, and Messier 74.
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