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Picture Album: Youthful-looking Galaxy May Be an Adult

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Youthful-looking Galaxy May Be an Adult
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The galaxy I Zwicky 18, originally thought to be a young galaxy, actually seems to have formed around the same time as most other galaxies. The bluish-white knots in the heart of the galaxy are two major star-forming regions.

Credit: NASA, ESA, and A. Aloisi (Space Telescope Science Institute and European Space Agency, Baltimore, Md.)

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