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White Star in Ursa Minor
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A white, A-type star lying more than 170 light years
from the Sun. After Polaris,
this is one of the closest stars to the Northern Celestial Pole.
A close-up view of Yildun in Ursa Minor. Matter thrown outward from the star's photosphere forms loops and fan shapes ('prominences') thousands of miles across.
eSky © copyright Mark Fisher 1999-2019