Big Bear, Little Bear

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NGC 6251 – Seyfert 2 Galaxy". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg . Retrieved 21 July 2015. Watson, Christopher (4 January 2010). "W Ursae Minoris". The International Variable Star Index. American Association of Variable Star Observers . Retrieved 18 July 2015. According to Diogenes Laërtius, citing Callimachus, Thales of Miletus "measured the stars of the Wagon by which the Phoenicians sail". Diogenes identifies these as the constellation of Ursa Minor, which for its reported use by the Phoenicians for navigation at sea were also named Phoinikē. [6] [7]

Big bear, little bear : Bedford, David, 1969- : Free Download

a b Otero, Sebastian Alberto (4 December 2007). "Alpha Ursae Minoris". The International Variable Star Index. American Association of Variable Star Observers . Retrieved 16 May 2014. Gusev, A. S.; Pilyugin, L. S.; Sakhibov, F.; Dodonov, S. N.; Ezhkova, O. V.; Khramtsova, M. S.; Garzónhuhed, F. (2012). "Oxygen and Nitrogen Abundances of H II regions in Six Spiral Galaxies". Monthly Notices of the Royal Astronomical Society. 424 (#3): 1930–40. arXiv: 1205.3910. Bibcode: 2012MNRAS.424.1930G. doi: 10.1111/j.1365-2966.2012.21322.x. S2CID 118437910. An alternative myth tells of two bears that saved Zeus from his murderous father Cronus by hiding him on Mount Ida. Later Zeus set them in the sky, but their tails grew long from their being swung up into the sky by the god. [15] NGC 3172 (also known as Polarissima Borealis) is a faint, magnitude-14.9 galaxy that happens to be the closest NGC object to the north celestial pole. [71] It was discovered by John Herschel in 1831. [72]Watson, Christopher (4 January 2010). "RU Ursae Minoris". The International Variable Star Index. American Association of Variable Star Observers . Retrieved 18 July 2015. Alpha Ursae Minoris – Classical Cepheid (Delta Cep Type)". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg . Retrieved 19 August 2014. Albright, William F. (1972). "Neglected Factors in the Greek Intellectual Revolution". Proceedings of the American Philosophical Society. 116 (3): 225–42. JSTOR 986117. Traditionally known as Pherkad, Gamma Ursae Minoris has an apparent magnitude that varies between 3.04 and 3.09 roughly every 3.4hours. [32] It and Kochab have been termed the "guardians of the pole star". [3] A white bright giant of spectral type A3II-III, [32] with around 4.8times the Sun's mass, 1,050times its luminosity and 15times its radius, [33] it is 487±8 light-years distant from Earth. [28] Pherkad belongs to a class of stars known as Delta Scuti variables [32]—short period (six hours at most) pulsating stars that have been used as standard candles and as subjects to study asteroseismology. [34] Also possibly a member of this class is Zeta Ursae Minoris, [35] a white star of spectral type A3V, [36] which has begun cooling, expanding and brightening. It is likely to have been a B3 main-sequence star and is now slightly variable. [35] At magnitude 4.95 the dimmest of the seven stars of the Little Dipper is Eta Ursae Minoris. [37] A yellow-white main-sequence star of spectral type F5V, it is 97 light-years distant. [38] It is double the Sun's diameter, 1.4times as massive, and shines with 7.4times its luminosity. [37] Nearby Zeta lies 5.00-magnitude Theta Ursae Minoris. Located 860 ± 80light-years distant, [39] it is an orange giant of spectral type K5III that has expanded and cooled off the main sequence, and has an estimated diameter around 4.8times that of the Sun. [40] In Inuit astronomy, the three brightest stars—Polaris, Kochab and Pherkad—were known as Nuutuittut "never moving", though the term is more frequently used in the singular to refer to Polaris alone. The Pole Star is too high in the sky at far northern latitudes to be of use in navigation. [17] In Chinese astronomy, the main stars of Ursa Minor are divided between two asterisms:

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Ridpath, Ian. "Ursa Minor". Star Tales. Self-published . Retrieved 7 March 2015. Blomberg, Peter E. (2007). "How Did the Constellation of the Bear Receive its Name?" (PDF). In Pásztor, Emília (ed.). Archaeoastronomy in Archaeology and Ethnography: Papers from the Annual Meeting of SEAC (European Society for Astronomy in Culture), held in Kecskemét in Hungary in 2004. Oxford, UK: Archaeopress. pp.129–32. ISBN 978-1-4073-0081-8. The original "bear" is thus Ursa Major, and Ursa Minor was admitted as the second, or "Phoenician Bear" (Ursa Phoenicia, hence Φοινίκη, Phoenice) Mighell, Kenneth J.; Burke, Christopher J. (1999). "WFPC2 Observations of the Ursa Minor Dwarf Spheroidal Galaxy". The Astronomical Journal. 118 (366): 366–380. arXiv: astro-ph/9903065. Bibcode: 1999AJ....118..366M. doi: 10.1086/300923. S2CID 119085245. Theta Ursae Minoris – Variable Star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg . Retrieved 30 July 2014.

The tradition of naming the northern constellations "bears" appears to be genuinely Greek, although Homer refers to just a single "bear". [8] Kaler, James B. (20 December 2013). "Pherkad". Stars. University of Illinois . Retrieved 18 May 2014. Mattei, Janet A.; Foster, Grant (1995). "Dramatic Period Decrease in T Ursae Minoris". The Journal of the American Association of Variable Star Observers. 23 (2): 106–16. Bibcode: 1995JAVSO..23..106M. Perley, R. A.; Bridle, A. H.; Willis, A. G. (1984). "High-resolution VLA Observations of the Radio Jet in NGC 6251". Astrophysical Journal Supplement Series. 54: 291–334. Bibcode: 1984ApJS...54..291P. doi: 10.1086/190931.

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Jenniskens, Peter (September 2012). "Mapping Meteoroid Orbits: New Meteor Showers Discovered". Sky & Telescope: 24. Teddy bear is the friendliest and the most popular bear form which is known to everyone. Generally, popular among children in form of stuffed teddy bear toys. And if you want to relive and cherish your childhood forever, then you can get yourself inked with teddy bear tattoos.van den Bergh, Sidney (April 2000). "Updated Information on the Local Group". The Publications of the Astronomical Society of the Pacific. 112 (#770): 529–36. arXiv: astro-ph/0001040. Bibcode: 2000PASP..112..529V. doi: 10.1086/316548. S2CID 1805423. Bianchini, A.; Tappert, C.; Canterna, R.; Tamburini, F.; Osborne, H.; Cantrell, K. (2003). "RW Ursae Minoris (1956): An Evolving Postnova System". Publications of the Astronomical Society of the Pacific. 115 (#809): 811–18. Bibcode: 2003PASP..115..811B. doi: 10.1086/376434. a b "Beta Ursae Minoris – Variable Star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg . Retrieved 18 May 2014.

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a b Kenneth R. Lang (2013). Essential Astrophysics. Springer Science & Business Media. pp.10–15. ISBN 978-3-642-35963-7. Polar bears are the most famous and cute bears. These bears are found in the colder region of this plant. These bears are endemic to the North Pole. They are white in colour. This bear symbolizes power, love and protection. In this tattoo, the artist has inked a scene from the book ‘Can’t You Sleep Little Bear’. In this bear tattoo, there are two bears, one is the mother bear with her tiny white cub. This cub tattoo portraits the affection between the mother and her child. Behind them, there are snow-clad mountains. We can also spot a red sun along with tiny stars in the sky. The tiny bear’s face is filled with excitement and happiness. This one tattoo can be counted in as one of the popular themes for a bear tattoo.O'Meara, Stephen James (1998). The Messier Objects. Deep-sky Companions. Cambridge, UK: Cambridge University Press. p. 10. ISBN 978-0-521-55332-2. Bortle, John E. (February 2001). "The Bortle Dark-Sky Scale". Sky & Telescope . Retrieved 29 November 2014. There are various proposed explanations for the name Cynosura. One suggestion connects it to the myth of Callisto, with her son Arcas replaced by her dog being placed in the sky by Zeus. [11]