Polaris (α Ursae Minoris) is a yellow white star (F7:Ib-IIv SB) in the constellation of Little Bear.
Polaris, also known as the Pole Star or North Star, is the main star in the constellation Little Bear. It is very close to the northern celestial pole, hence its name. Visually, Polaris is a double star, with the much fainter companion being visible only in telescopes. It was discovered in 1780 by William Herschel, a British-German astronomer, musician, and composer. The main star is a double star itself, but it took until the year 2006 when it could be resolved into two components using the Hubble Space Telescope.
Polaris is one of the most important stars in the night sky, at least on the northern half of our planet, since Polaris makes it easy to determine North and the latitude of one's position on Earth. For centuries sailors have relied on Polaris to determine their position on the ocean. Only since the introduction of GPS this has become less important, but it is still a popular exercise for people who want to get along without electrical aides.
2h 31m 47.08s (37.94615°)
The magnitude (brightness) is measured on a logarithmic scale. Small numbers mean bright stars: A star with a brightness of 1 mag is 100 times brighter that an star with 6 mag.
The distance is measured in light years (LY). A light year is the distance, that light travels within one year. 1 LJ is equal to about 5,878,630,000,000 miles.
This star belongs to the huge UCAC 3 catalog. It is identified by this number in the UCAC 3 catalog.
Every star belongs to a constellation, and 12 of those constellations are part of the zodiac.
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