Published on Feb 3, 2019
Polaris, designated α Ursae Minoris, commonly the North Star or Pole Star, is the brightest star in the constellation of Ursa Minor. It is very close to the north celestial pole, making it the current northern pole star. The revised Hipparcos parallax gives a distance to Polaris of about 433 light-years (133 parsecs). Polaris is a triple star system, composed of the primary star, Polaris Aa (a yellow supergiant), in orbit with a smaller companion (Polaris Ab); the pair in orbit with Polaris B (discovered in August 1779 by William Herschel). The wide companion star is visible in small telescopes. The close companion, Polaris Ab was known to exist from measurements of a wobble in Polaris, caused by the gravitational tug of its companion, but has only been seen directly now using Hubble. http://hubblesite.org/image/1842/news... Polaris is located in the constellation of Ursa Minor, the Little Dipper. Polaris, the North Star, lies at the end of the handle of the Little Dipper. https://earthsky.org/astronomy-essent... The best way to find your way to Polaris is to use the so-called "Pointer" stars in the bowl of the Big Dipper, Dubhe and Merak. Just draw a line between these two stars and extend it out about 5 times, and you eventually will arrive in the vicinity of Polaris. https://www.space.com/15567-north-sta... https://earthsky.org/tonight/use-the-...