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This detailed image, taken by NASA's Hubble Space Telescope, shows a classical spiral galaxy in the constellation Leo Minor, 100 million light-years from Earth. The galaxy has a bright core, from which a series of spiral arms radiate outward like pinwheels. The spiral arms are characterised by dark dust lanes and bright star formation regions.
The prominent spiral structure of this galaxy may be an important example of Edwin Hubble's classification of galaxies. In 1926, Hubble wrote a paper classifying galaxies according to their appearance as spiral, barred spiral, lenticular, elliptical and irregular. The Milky Way belongs to this broad class of galaxies defined by its spiral arms.
The image shows a large spiral galaxy in deep space. A bright core is surrounded by clearly defined spiral arms. Around the galaxy's main spiral structure, small and bright blue star-forming regions stand out.
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