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References
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What is the North Star and How Do You Find It? - NASA ScienceJul 28, 2021 · Polaris, the North Star, is located above Earth's north pole and helps find true north. Find it by using the Big Dipper's pointer stars.
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Why is Polaris the North Star? - StarChild - NASAWe call that star the "North Star" since it sits in the direction that the spin axis from the northern hemisphere of Earth points. At present, the star known as ...Missing: facts | Show results with:facts
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What's Up: April 2019 Skywatching from NASAApr 1, 2019 · Polaris, also called the North Star, is a yellow supergiant star located about 400 light-years away in the constellation Ursa minor. It has two ...
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Polaris - Alpha Ursae Minoris - AstroPixelsAug 9, 2018 · Polaris or Alpha Ursae Minoris (Alp UMi) is the brightest naked eye star in the constellation Ursa Minor. With an apparent magnitude of 1.97v,
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There's More to the North Star Than Meets the Eye - NASA ScienceJan 9, 2006 · Polaris is a supergiant more than two thousand times brighter than the Sun, while its companion is a main-sequence star.
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Where did stars get their names from?This was taken up by Gemma Frisius in his De Astrolabo Catholico liber in the 1550s and adapted to stella illa quae polaris dictur („star, which is called Polar ...
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Polaris (the North Star) | Star FactsSep 27, 2024 · The star's name in Old English was scip-steorra, or “ship-star,” and an even older name was lodestar, meaning “guiding star.” The Old Norse name ...
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Polaris - Constellations of WordsPolaris is a star in the tip of the tail of the Little Bear. Its name comes to us from Latin Stella Polaris, meaning “Pole Star”.
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Star Tales – Ursa Minor - Ian RidpathThe present-day Polaris (not at that time the pole star) was known by the Arabs as al-jady, representing a young goat. The second star in the Little Bear's tail ...
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An introduction to Arabian astronomy | BBC Sky at Night MagazineDec 12, 2019 · One you may know as Polaris, our current North Star; in Arabia, this was called the Goat Kid (al-jady الجدي) . The others were a pair of stars ...<|control11|><|separator|>
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The Chinese pole star - MY SCIENCE WALKSThe pole star for the Chinese at this time was known as Tianshu, the Celestial Pivot, or Niuxing, Pivot Star, and although not particularly bright (certainly ...Missing: Guíxīng | Show results with:Guíxīng
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Polaris, the North Star | Center for AstrophysicsThe North Star, Polaris, is a Cepheid variable: one whose mass, age and physical conditions generate periodic oscillations with a period proportional to the ...<|control11|><|separator|>
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Polaris - HyperPhysicsThe luminosity of Polaris varies at a period of 3.97 days and it orbits Polaris B with a period of approximately 30 years. ... Their separation is about 18.5 AU.Missing: 18 | Show results with:18
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DIRECT DETECTION OF THE CLOSE COMPANION OF POLARIS ...For the faint companion Polaris Ab we find a dynamical mass of 1.26+0.14−0.07 M☉, consistent with an inferred spectral type of F6 V and with a flux difference ...
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Polaris B, an optical companion of Polaris (alpha UMi) system - arXivAug 2, 2007 · At a spectral type of F3V Polaris B has a luminosity of 3.868L_sun, an absolute magnitude of +3.30mag, and a distance of 109.5pc. The mass of ...
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Artist's Concept of Polaris System - Annotated - NASA ScienceJan 9, 2006 · The North Star, Polaris A is a bright supergiant variable star. Just above Polaris is a small companion, Polaris Ab, which is 2 billion miles ...
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Polaris A and Polaris B - NASA ScienceJan 9, 2006 · Pluto & Dwarf Planets · Asteroids, Comets & Meteors · The Kuiper Belt ... Polaris (star Aa) and star B are on average 2,400 Astronomical Units ...
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[PDF] astrometric orbit, position, and proper motion - arXivThe age of α UMi A, and therefore of the whole system of Polaris, can be estimated from the period-age relation for Cepheids (Becker et al. 1977, Tammann ...
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The Orbit and Dynamical Mass of Polaris: Observations with the ...Aug 20, 2024 · The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through ...
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A Precise Distance to Our Nearest Cepheid from Gaia DR2Polaris serves as an important astrophysical laboratory for studying stellar pulsation, Cepheid properties (including calibration of the Leavitt period– ...
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Evolutionary status of Polaris - Oxford Academic... Cepheid ... As shown below, determination of the evolutionary status provides constraints on the pulsation mode and the fundamental parameters of Polaris.
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NoneNothing is retrieved...<|control11|><|separator|>
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Polaris is the present-day North Star of Earth - EarthSkyMay 16, 2025 · Polaris B, with magnitude 8.7, is located approximately 240 billion miles (390 billion km) from Polaris A. This translates to 18.4 arcseconds, ...Missing: apparent | Show results with:apparent
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Circumpolar stars never rise or set and depend on latitude - EarthSkyJun 3, 2025 · From the Southern Hemisphere, at a latitude of 20° south, then everything south of -70° declination is circumpolar, above your southern horizon.
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Thuban was the North Star for the ancient Egyptians - EarthSkyAug 12, 2025 · The 26,000-year cycle of precession causes Earth's north pole to trace out a counterclockwise circle among the stars.
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[PDF] arXiv:2003.02326v2 [astro-ph.SR] 21 Mar 2020Mar 21, 2020 · ... F-type main sequence star Polaris Ab and a more distant companion. 1. Page 2. 2. Neilson and Blinn that is also an F-type star Polaris B.Missing: spectral | Show results with:spectral
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THE PERIOD CHANGE OF THE CEPHEID POLARIS SUGGESTS ...Jan 16, 2012 · O − C data from 1844/5–2011, from both radial velocity and photometry measures, are shown for the Cepheid Polaris. For the purposes of fitting, ...
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The Remarkable Brightness Increase of Polaris from Historical and ...May 31, 2004 · Its light variation has decreased from ~0.15 mag (visual) in ... We have reconstructed its apparent visual magnitude by comparing its ...
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Effective temperature and radial velocity of the small-amplitude ...Oct 12, 2016 · Abstract:We present the results of an analysis of 21 spectra of alpha UMi (Polaris) obtained in September - December 2015.Missing: 0.15 mag
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PRECISE RADIAL VELOCITIES OF POLARIS - IOP ScienceIt has been discovered that the pulsational amplitude has been decreasing dramatically during the 20th century (Arellano Ferro 1983; Dinshaw et al. 1989). So it ...
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[PDF] Modeling Pulsations of Cepheid Variables using the Open-Source ...Feb 21, 2020 · Cepheids show a period-luminosity relation, discovered by Henrietta Leavitt in 1908, that has been used to determine distances within the Galaxy ...
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North Star May Be Wasting Away | Science | AAASJan 27, 2012 · This long record, from 1844 to the present, shows that the pulse of Polaris runs about 4.5 seconds slower every year. The changing rate suggests ...Missing: period per
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[PDF] The Mathematical Dynamics of Celestial Navigation and ...Mar 7, 2009 · Between the equator and the North Pole, the angle of Polaris above the horizon is a direct measure of geographic or terrestrial latitude. If a ...
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[PDF] 2Patterns in the Sky— Motions of Earth - UCCSMay 10, 2011 · This star is called Polaris, the. “North Star.” If you can find Polaris in the sky and measure its altitude, then you know your latitude. If ...Missing: principle | Show results with:principle
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[PDF] Basic principles of celestial navigation - SciSpacenorth celestial pole of angular radius 0.73°, an improvement in accuracy in determining the latitude is to observe Polaris at specific moments identified ...
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Gamma Cephei, aka Errai, a future North Star - EarthSkySep 28, 2025 · Gamma Cephei stands next in line to inherit the North Star title in around 4,000 CE. And as axial precession continues to trace this cosmic ...<|separator|>
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What bright stars will become the North Star in the future?Aug 25, 2025 · Throughout the Earth's precessional cycle, different stars serve as a pole star, including Thuban, Kochab, Polaris, and Vega.
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Navigators in the 1490s | Proceedings - December 1992 Vol. 118/12 ...Astrolabes like this one measured angles of elevation, but depended on free-hanging plumb weights to maintain their vertical orientation. Observations from the ...
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Full article: Practical Assessment of the Accuracy of the AstrolabeMar 1, 2013 · The straight edge of the quadrant was easier to line up with Polaris ... navigation using the astrolabe might be in practice. Most academic ...
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The changing pole star - Explaining ScienceSep 25, 2020 · They have a more distant companion called Polaris B which takes 5000 years to do a single orbit around Polaris A. In 1894 the American ...Missing: 18500 separation 2400 AU
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Alphabet of the stars | The Renaissance MathematicusMar 17, 2021 · Historically for navigators in the northern hemisphere the most important star was the pole star, currently Polaris (the star designated the ...
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The HIPPARCOS parallax for PolarisThe distance of 99 ± 2 pc suggested by TKUG on the basis of the assumed pulsation mode of Polaris is equivalent to a parallax of 10.1 ± 0.2 mas, very different ...
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Extended envelopes around Galactic Cepheids - II. Polaris and δ ...This criteria led to projected baselines of roughly 150m, corresponding to W2-E2 and S2-W2 at the. CHARA Array. These latter baselines were chosen with similar.
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Hubble Space Telescope Trigonometric Parallax of Polaris B ...We converted the FGS relative parallax to absolute, using estimated distances to the reference stars from ground-based photometry and spectral classification.
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spectroscopic orbit of Polaris and its pulsation propertiesPolaris is the nearest and brightest classical Cepheid, and pulsates with a period of about 4 d. It has long been known as a single-lined spectroscopic binary.
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A 0.9% calibration of the Galactic Cepheid luminosity scale based ...This study uses Gaia DR3 data to improve the calibration of the Cepheid luminosity scale by searching for open clusters near Cepheids, achieving the most ...
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[PDF] An analysis of the development of celestial navigationearlier, the Phoenicians were engaged in trade with Egypt, with the island ... requires a correction which depends upon the position of Polaris with.
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Vikings Could Have Used 'Sunstones' to Navigate the North AtlanticApr 11, 2018 · Vikings undoubtedly used celestial navigation to orient themselves when the sun went down. Polaris, the North Star, was was probably the most ...
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A Practical Guide to Navigating By The Stars - BASE MagazineJan 31, 2023 · However, there is a technique the Polynesians developed to make use of Polaris ... These are called 'circumpolar stars' and they can be found in ...
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Navigation and Related Instruments in 16th-Century EnglandThe astrolabe was used to determine latitude by measuring the angle between the horizon and Polaris, also called the North Star, the Pole Star, or Stella Maris ...Missing: portolan | Show results with:portolan
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Columbus use of Dead Reckoning (DR) navigation and Celestial ...Columbus tried to find his latitude using the quadrant on October 30, 1492. At the time, he was about 20 degrees North latitude.
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[PDF] Celestial Navigation Second EditionChapter 9. Moon Sights. 9.1 Introduction .............................................................100. 9.2 Sight Reduction of the Moon .
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The Chronometer | Time and NavigationMaking the sea clock practical was critical to improving sea navigation. To design and build a standardized seagoing timekeeper took decades.
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Polaris: How to find the North Star | SpaceJan 24, 2022 · Polaris is located at a distance of 323 light-years from Earth ... Only about 0.7 degree separates Polaris from the North Celestial Pole ...Polaris · Finding Polaris · Navigation · Symbolism
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U.S. Navy Brings Back Navigation By The Stars For Officers - NPRFeb 22, 2016 · A decade after phasing out celestial navigation from its academy courses, the U.S. Navy has restarted that formal training.Missing: Polaris | Show results with:Polaris
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Ursa Minor Constellation (the Little Bear): Stars, Myth, Facts, LocationThe brightest star in the constellation is Polaris, the North Star (Alpha Ursae Minoris), with an apparent magnitude of 1.97. The constellation contains 39 ...
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The Myth of Ursa Major and CallistoCallisto, a nymph, was seduced by Zeus, transformed into a bear by Artemis, and then placed as Ursa Major in the sky with her son Arcas as Ursa Minor.Missing: Norse Yggdrasil<|separator|>
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Meet Polaris, the North Star - Sky & TelescopeApr 19, 2018 · 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.Missing: Callisto Yggdrasil
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[PDF] Inuit and Chukchi Star lore: Reflections on Ursa Major, the North ...Nov 14, 2016 · Macdonald describes the Inuit understanding of Polaris: “Inuit designations for stars and star groupings fall into several categories. The ...
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Stars and Constellations in FlagsAs depicted on the flag, its stars can be used as a guide by the novice to locate Polaris and determine true north. The design was created by Benny Benson of ...
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The Truth About Betsy Ross - Colonial WilliamsburgIt provided for fifteen stripes and fifteen stars, reflecting the addition of Vermont and Kentucky to the Union after the war. This flag flew over Fort McHenry.
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Country Flags With Stars - World AtlasDec 10, 2019 · The star symbolizes the Northern Hemisphere archipelago. The 24 points represent the electoral districts of the Marshall Islands, while the four ...<|separator|>
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Maine's Coat of Arms - State Symbols USAAll Coats of Arms. Symbols on Maine's Coat of Arms. The North star (Polaris) shines above Maine's motto: "Dirigo" ("I Lead," or "I Direct"). Polaris is not ...
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Masonic Encylopedia Entry On North Star - The Ashlar CompanyThe North Star is the Pole Star, the Polaris of the mariner, the Cynosura. that guides Freemasons over the stormy seas of time.
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The Enterprise Transcripts - HomeOct 22, 2004 · Star Trek Enterprise episode transcripts. ... ARCHER: Just to the left of Polaris. We found our first M-class planet around that star. ERIKA ...
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Polaris | Memory Alpha - FandomPolaris (the "North Star" or Alpha Ursae Minoris) was the brightest star in the constellation Ursa Minor. It was orbited by at least twelve planets, ...
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Jimmy Eat World – Polaris Lyrics - GeniusPolaris Lyrics: I'll say it straight and plain / I know I've made mistakes / I've always been afraid / (I've always been afraid) / A thousand nights or more ...
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Expedition Eight: Polestar - No Man's SkyJul 27, 2022 · Embark on an interstellar cruise as the captain of a heavy shipping freighter, warping your metal fortress across the galaxy.
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Polaris DawnThe Polaris Dawn crew conducted research with the aim of better understanding the effects of spaceflight and space radiation on human health.Missing: stamps | Show results with:stamps