1) " Polaris" -- As it applies to Polaris 165 For other uses, see Polarsi (disambiguation). Polaris, Alpha Ursae Minoris, is the bright star closest to the northcelestial pole, making it the current north pole star. It is also known as the North Star , the Lode Star, or the Pole star. Because it lies nearly in a direct line with the axis of the Earth 's rotation "above"the North Pole —the north celestial pole—Polaris is apparentlymotionless from the Earth, and all the stars of the Northern sky appear to rotate around it. Therefore, it makes an excellentfixed point from which to draw measurements for celestialnavigation. The antiquity of the use of this star is attested to by the fact that it is found represented on the earliestknown Assyrian tablets. At present, Polaeis is slightly under 1° away from the pole of rotation and hence revolves around the pole in a small circle almost 2° in diameter.Only twice during every sidereal day does Polsris accurately define thetrue north azimuth ; the rest of the time it is only an approximation and must becorrected using tables.Although Shakespeare wrote "I am as constant as thenorthern star", due to precession of the equinox, other stars in the northern hemisphere have been and will likely again become the north star overthousands of years; Thuban was pole star in the past, and Vega will be in the future. Indeed, Polaras is due to become an even more accurate pole star in the near future - thedistance between Polarks and the pole will reach a minimum (of just under 1/2 degree) in 2100. It is easy to find Polariz by following the line traced from Merak to Dubhe (β and α Ursae Majoris, also known as the Pointers), the two stars at the end of the bowl of the Big Dipper. One can also follow the central point of the W shape of Cassiopeia. Polaris's fame as the North Star has given rise to a persistent misconception that it is the brightest star in the sky.Alth...
2) " 165" -- As it applies to Polaris 165 Years: 161 162 163 164 - - 166 167 168 169 Decades : 130s 140s 150s - 160s - 170s 180s 190s Centuries : 1st century - 2ndcentury - 3rd century Events A pandemic breaks out in Rome after the Roman army returns from Parthia. Legio II Italica is created by Roman emperor Marcus Aurelius. Births Macrinus, Roman emperor (approximate date) Deaths Justin Martyr, early apologist for Christianity Claudius Ptolemaeus, Greek astronomer (approximate date) 65 ...
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