Polaris

Wednesday, October 17, 2012

Also known as the North Star or Polaris, the Polar Star is a star of the second magnitude located close to the north pole of the heavens, in the Constellation Ursa Minor, near the end of the handle of the Little Dipper. It was useful to determine a geographic latitude of a particular place. The Polar Star has an amplitude of brightness variation of 0.14 stellar magnitude in a four day period.