Polaris, also known as Alpha Ursae Minoris (α Ursae Minoris, abbreviated Alpha UMi, α UMi), commonly the North Star or Pole Star, is one of the most famous stars in Human history. It has on again, off again been Earth's northern star.
Polaris is a trinary star system, comprised of Polaris Aa, a stellar class F7 Ib white supergiant, it's close orbiting companion Polaris Ab, a class F6 V white main sequence star, and Polaris B, a class F3 V white main sequence star which orbits the other two stars.
Ever since ancient times, Polaris has been known as the North Star, even after Humans took to the stars. Its historical significance has never been lost. As seen from Earth, Polaris was located near the end of Ursa Minor, the Little Dipper. It was long used by navigators on sea vessels on Earth as a locator.
The first Human vessel to visit the star was the Polaris Express in 2100 CE, one of the ships commissioned by the MSEP. While it didn't discover any planets orbiting any of the stars, the voyage was significant in that one of the most famous stars in human history had been visited. The Polaris Express stayed in the star system for a year, taking readings and sending them back to NASA.
In the year 2234, the URSS set up a large habitat in orbit around the first two stars. It was known as the Polaris Playground, and it remained one of the largest amusement parks for many hundreds of years afterwards. The Polaris Playground was eventually decomissioned and a new Polaris Playground was built in the form of a ringworld, placed in orbit around the two main stars.