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Guide to using Big Dipper to locate Arcturus, Spica, and Polaris. Not only are the stars in the Big Dipper easily found themselves, they may also be used as guides to other stars outside of the asterism. Thus it is often the starting point for introducing Northern Hemisphere beginners to the night sky:
Polaris is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris (Latinized to Alpha Ursae Minoris) and is commonly called the North Star or Pole Star. With an apparent magnitude that fluctuates around 1.98, [3] it is the brightest star in the constellation and is readily visible to the naked eye at ...
The star is of magnitude 5.0 and is approximately 46 light-years from Earth. [14] The star TYC 3429-697-1 (9 h 40 m 44 s 48° 14′ 2″), located to the east of θ Ursae Majoris and to the southwest of the "Big Dipper") has been recognized as the state star of Delaware, and is informally known as the Delaware Diamond. [18]
A method to find the Pole star Polaris at 5x the distance of the two front stars of the Big Dipper The path of the north celestial pole among the stars due to the effect of precession, with dates shown The path of the south celestial pole among the stars due to the effect of precession
The Big Dipper asterism. The Big Dipper, also known as The Plough or Charles's Wain, is composed of the seven brightest stars in Ursa Major. [5] These stars delineate the Bear's hindquarters and exaggerated tail, or alternatively, the "handle" forming the upper outline of the bear's head
The state flag of Alaska displays eight gold stars, forming the Big Dipper and Polaris, on a dark blue field. The Big Dipper is an asterism in the constellation Ursa Major, which symbolizes a bear, indigenous to Alaska. As depicted on the flag, its stars can be used as a guide by the novice to locate Polaris and determine true north.
From most of the United States (above lat. 40° N) the Big Dipper is circumpolar". [4] Similarly, the star will never rise above the local horizon if δ − θ is less than −90° (observer in Northern Hemisphere), or δ − θ is greater than +90° (observer in Southern Hemisphere).
To find Polaris, from a point in the Northern Hemisphere, face north and locate the Big Dipper (Plough) and Little Dipper asterisms. Looking at the "cup" part of the Big Dipper, imagine that the two stars at the outside edge of the cup form a line pointing upward out of the cup.