Article: Hubble reveals North Star's hidden second companion

Hubble reveals North Star's hidden second companion

WASHINGTON, Jan. 9 (Xinhua) -- Scientists can finally figure out the mass of the North Star, or Polaris, after the Hubble Telescope has captured the first image of a hidden second companion of the North Star, U.S. astronomers said on Monday.

With the image of Polaris Ab, astronomers estimated the mass of the North Star at about four times that of our sun. The North Star, more than 2,000 times brighter than the sun, ...

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