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  • Whats the distance to Polaris? - Sky Telescope
    If a star is closer to the Sun than about 50 light-years, astronomers probably know its distance to 1 percent accuracy; farther away, the uncertainty in the value climbs dramatically The most reliable distance to Polaris is that published in 1997 by the European Space Agency’s Hipparcos mission: 430 light-years with an uncertainty of ± 30
  • Meet Polaris, the North Star - Sky Telescope
    Polaris appears dim to us only because of its immense distance from Earth In reality, the star is a behemoth — a yellow supergiant that’s in a short-lived phase before the star balloons into a red supergiant It’s the largest and brightest member of a triple star system, which includes the main-sequence F-class stars Polaris B and
  • Meet Kochab, a Guardian of the Pole - Sky Telescope
    The north celestial pole is about 40 arcminutes from Polaris, almost exactly on the imaginary line from Polaris to Kochab If you're aligning an equatorial telescope mount or estimating your latitude from the elevation of Polaris above the northern horizon, it's helpful to remember that the pole is two thirds of a degree from Polaris toward Kochab
  • See the Surface of Polaris, the North Star - Sky Telescope
    This visualization shows bright and dark spots on the surface of the North Star, Polaris Polaris appears about 600,000 times smaller than the Full Moon in the sky Evans et al Astrophysical Journal 2024 Astronomers have used an array of telescopes to reconstruct images of the surface of Polaris, the North Star It's the first time that
  • Refining Hipparcoss Star Distances - Sky Telescope
    For instance, the distance to Polaris (a key star because it's the nearest Cepheid variable and thus a steppingstone to the distances of other galaxies) goes from 431 ± 30 light-years to 432 ± 7 And Deneb, originally pegged at 3,200 light-years but with an uncertainty that could put it almost anywhere, moves to 1,410 ± 230 light-years
  • Probing Polaris - Sky Telescope
    The most famous of the bunch has to be Polaris, the North Star No other naked-eye star hovers closer to the celestial north pole But this 2nd-magnitude star holds secrets not visible to the naked eye: it's actually a triple-star system, and, at a distance of just 430 light-years, it's the brightest Cepheid variable in the sky
  • Mysteries of the North Star - Sky Telescope
    These properties would be easier to determine if Polaris were part of a star cluster, in which all stars are at about the same distance and have the same age At the AAS meeting Turner presented circumstantial evidence that the Pole Star is indeed a member of a very sparse moving group of main-sequence stars in the same part of the sky
  • A Visit to the Skys North Pole - Sky Telescope
    Polaris is the "diamond" in the Engagement Ring, a pretty asterism half a degree wide to its south David Ratledge Things can be lonely at the pole, a relatively empty region of the sky, but Polaris glitters like a diamond atop a lovely asterism dubbed the "Engagment Ring," a loopy band of 9th-magnitude stellar gems plainly visible in
  • The Big Dipper: Hop to Springs Sky Sights - Sky Telescope
    Polaris, the North Star Throughout the course of the year, the Big Dipper appears to orbit Polaris, also known as the North Star, and the brightest star in the Ursa Minor, the Little Dipper Start by finding the two stars at the front end of the Dipper’s “bowl,” Merak at the closed side and Dubhe at the open side
  • Meet Alkaid, the Big Dipper’s Handle - Sky Telescope
    So when you walk out under a night sky and look up, you might imagine the brightest stars as solar duplicates seen from a distance It’s a pleasant thought, but inaccurate Many of the brightest stars are actually much larger than the Sun Stars like Betelgeuse, Deneb, Antares, Aldebaran, Canopus, Rigel, Polaris — the list goes on — are





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