Polaris, Alpha Ursae Minoris (α UMi), commonly known as the North Star, is the closest relatively bright star to the north celestial pole. It lies at an estimated distance between 323 and 433 light years (99 to 133 parsecs) from Earth and has an apparent magnitude that varies between 1.86 and 2.13. Polaris is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris ( Latinized to Alpha Ursae Minoris) and is commonly called the North Star or Pole Star.
The First Star — POLARIS is the brightest star in the constellation...
Polaris is actually a triple star. It is located about 447.6 light-years from Earth and is the closest Cepheid variable. The Polaris goes from yellow to white. Because it sometimes shines bright, and sometimes, it dims out. Besides, Polaris is a triple-star system. The primary star is the supergiant star because of its mass. That is six times of sun. The primary star is Polaris A, and the other two are Polaris Ab and b. Now you know the color of Polaris. Polaris star color. All three stars in the Polaris system are of spectral type F. Such stars are typically white or yellow-white in color. However, their yellowish hue is very faint, so most stargazers will see Polaris as a white, medium-bright star. With the unaided eye, observers will only spot the light of the main star, a yellow supergiant. The North Star or Pole Star - aka Polaris - is famous for holding nearly still in our sky while the entire northern sky moves around it. That's because it's located very close to the north.
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Polaris ( Alpha Ursae Minoris) is the Pole Star or North Star. It is the brightest star in the constellation Ursa Minor. It is almost straight above Earth 's North Pole. Because of this, when it is seen from Earth, it looks like it always stays in the same place in the sky. The North Star: Polaris Constellation: Ursa Minor Star Type: F-Class Supergiant Mass: 4.5 times the mass of the Sun Luminosity: 2,500 times brighter than the Sun Diameter: 70 million km (50 x the Sun) Temperature: 5,700 Celcius Distance From Earth: 430 light-years Rotation Period: 119 days The North Star, Polaris, is a Cepheid variable: one whose mass, age and physical conditions generate periodic oscillations with a period proportional to the star's intrinsic luminosity. Polaris is one of the most searched-out stars in the northern hemisphere sky. It turns out that there's more than one star at Polaris. It's really a triple star system that lies around 440 light-years away from Earth. The brightest is what we call Polaris.
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What Color Is Polaris? Polaris appears white to the naked eye, but it is in reality, a multiple-star system consisting of three stars. The primary star, Polaris A, is a yellow supergiant with a surface temperature of approximately 6,000 Kelvin. Polaris Statistics Also Known As: Polaris A, Alpha Ursae Minoris, Pole Star, North Star Distance From Earth: 430 light years Constellation: Ursa Minor Star Type: F Class Supergiant Mass: 4.5 x Sun Luminosity: 2,500 x Sun Diameter: 44 million miles (70 million km) - 50 x Sun Temperature: 5,700C (10,300F) Age: Unknown Rotation Period: 119 days
In Norse tales, Polaris was the end of a spike around which the sky rotates; in Mongolian mythology, it's a peg that holds the world together. But overall, humanity's main interest in Polaris seems to be concerned with the practical side of the Pole Star; sailors and explorers used it for navigation for centuries. Polaris is the star nearly directly up from the North Pole hence why it is also known as the "North Star" in addition to being the "Pole Star". If you were to take a picture of the night sky so that you had star trails, If you then looked at all the photos, you would see that Polar stays still.
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Polaris is a "pulsing" star, a type of star also known as a Cepheid variable, which means that it appears to vary in brightness ever so slightly — only one tenth of a magnitude — over a time. Polaris is also called Alpha Ursae Minoris, because it's the brightest star in Ursa Minor, the Little Bear (also known as the Little Dipper). It is actually a multiple-star system made up of at least three stars. The largest star in the system is called simply Polaris A, and is a supergiant that has about six times the mass of the sun.
