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Ursa Major and Polaris with names of bright stars in the Big Dipper The constellation Ursa Major as it can be seen by the unaided eye The outline of the seven bright stars of Ursa Major form the asterism known as the " Big Dipper " in the United States and Canada, while in the United Kingdom it is called the Plough [ 6 ] or (historically ...
The Big Dipper seen from Fujian. The constellation of Ursa Major (Latin: Greater Bear) has been seen as a bear, a wagon, or a ladle.The "bear" tradition is Indo-European (appearing in Greek, as well as in Vedic India), [7] but apparently the name "bear" has parallels in Siberian or North American traditions.
The celestial north pole is located very close (less than 1° away) to the pole star (Polaris or North Star), so from the Northern Hemisphere, all circumpolar stars appear to move around Polaris. Polaris itself remains almost stationary, always at the north (i.e. azimuth of 0°), and always at the same altitude (angle from the horizon), equal ...
Northern Hemisphere circumpolar stars around Polaris, with a long-exposure producing a star trail photo. A pole star is a visible star that is approximately aligned with the axis of rotation of an astronomical body; that is, a star whose apparent position is close to one of the celestial poles.
To take into account such movement, celestial pole definitions come with an epoch to specify the date of the rotation axis; J2000.0 is the current standard. An analogous concept applies to other planets: a planet's celestial poles are the points in the sky where the projection of the planet's axis of rotation intersects the celestial sphere.
For the 1997 model year Polaris added twin cylinder case-reed inducted 700cc engines. They followed in 1998 with a 600cc version for those wanting a smaller displacement engine to the potent 700cc. Both the 600cc and 700cc engines were built in the US and used 39mm Keihin D-slide carburetors and digital CDI ignition and utilized a 136"x15"x1.75 ...
In 2008 Ski-Doo introduced the XP chassis, which moved the rider further forward with major weight reduction. The XP was the lightest machine available, with power-to-weight ratios in the Summit models for the first time under 3 lb per HP. For the 2017 snow year, Ski-Doo will release its most powerful engine. The Rotax 850 cc "Etec" engine.
The Big Dipper stars Dubhe (α UMa) and Alkaid (η UMa) are not members of the group, both being somewhat further away and moving in very different directions. The bright, nearby star Sirius was long believed to be a member of the group, but may not be, according to research in 2003 by Jeremy King et al. at Clemson University .