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・ North Point Office Building and Tower
・ North Point Park
・ North Point Park (Cambridge, Massachusetts)
・ North Point Park (Van Buren County, Michigan)
・ North Point Power Station
・ North Point Range Lights
・ North Point State Park
・ North Point Station
・ North Point Village, Dundalk, Maryland
・ North Point Water Tower
・ North Point, St. Louis
・ North Pointe Elementary School
・ North Pointe Preparatory
・ North Polar Basin
・ North Polar Basin (Mars)
North polar sequence
・ North Pole
・ North Pole (disambiguation)
・ North Pole depot
・ North Pole Marathon
・ North Pole Radio Station
・ North Pole Stream
・ North Pole, Alaska
・ North Pole, Idaho
・ North Pole, New York
・ North Pole-1
・ North Pole-2
・ North Pole-36
・ North Pole-37
・ North Polk Community School District


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North polar sequence : ウィキペディア英語版
North polar sequence

The North polar sequence is a group of 96 stars that was used to define stellar magnitudes and colors. The cluster of stars lies within two degrees of the Northern Celestial pole, which makes them visible to everyone on the northern hemisphere.
Originally proposed by Edward Charles Pickering, the system was used between 1900 and 1950. Today it has been replaced by the UBV photometric system.
==See also==

*Photometric system
*Stellar classification

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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