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The Pinwheel Galaxy (M101)

Code: M101, NGC 5457
Type: Spiral galaxy
Constellation: Ursa Major
Distance from the Sun: 17.4 million ly

M101 is one of the largest spiral galaxies visible from Earth. Its immense disk reveals a complex mosaic of spiral arms, nebulae, and star-forming regions.

Fun fact: M101 is full of H II regions, immense clouds of hydrogen where stars are born. These regions appear pink in images, surrounded by young blue stars, signs of intense star formation activity.

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