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circumpolar    
a. 极地附近的,围绕天极的,周极的
n. 周极星

极地附近的,围绕天极的,周极的周极星

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  • What are Circumpolar Stars? | Facts, Definition Examples
    A circumpolar star does not set, i e it is above the horizon all the time What stars are circumpolar for a particular observer will depend on their latitude Image via: starlight-nights co uk Notice the following: The pole star is 55 degrees above the horizon Remember your latitude is equal to the altitude (angle above the horizon) of Polaris
  • The Southern Cross Asterism | Facts, Information, History Definition
    The Southern Cross asterism is shaped as a cross, or as a kite It holds special importance in Australia and New Zealand, where the constellation of Crux is circumpolar and can be seen throughout the year The primary star of the Southern Cross, Acrux, is the 13 th brightest star in the sky, and it is actually a multiple star system
  • The Big Dipper Facts For Kids - The Nine Planets
    The Big Dipper is a circumpolar asterism That means it never sets, but instead, it revolves around the north pole, more precisely around the North Star For this particular reason, it can be used as a celestial clock Its full rotation takes precisely 23 hours and 56 minutes, which is four minutes shorter than the typical 24-hour day
  • Merak (β Ursae Majoris) | Facts, Information, History Definition
    Merak and the Ursa Major constellation is circumpolar and thus can be seen throughout the year to most observers in the northern hemisphere All the months of spring are favorable in observing this constellation Ursa Major is the third largest constellation and the largest of all the northern constellations
  • Ursa Major Constellation - The Nine Planets
    However, Ursa Major is best seen throughout the year from most of the northern hemisphere and appears circumpolar above the mid-northern latitudes From southern temperate latitudes, the main asterism is invisible, but the southern parts of the constellation can still be viewed Right Ascension: 10 67 hours; Declination: + 55 38 degrees
  • Ursa Minor Constellation | Facts, Information, History Definition
    Ursa Minor, also known as the Little Bear, is a constellation in the Northern Sky It is the 56 largest constellation in the sky, and its brightest star is the North Pole Star – Polaris
  • Crux Constellation | Facts, Information, History Definition
    Crux is not visible north of “20 o in the northern hemisphere, and it is circumpolar south of 34 o S, this means that it never sets below the horizon On the celestial sphere, Crux is exactly opposite the constellation Cassiopeia Right Ascension: 12 6 h; Declination: -60 o; Visible: +20 o and -90 o
  • Alderamin (α Cephei) Star | Facts, Information, History, Distance . . .
    Alderamin can be seen north of latitude 27S and is circumpolar The constellation of Cepheus contains many notable stars such as Delta Cephei, the prototype for Cepheid variables, Beta Cephei, the prototype for Beta Cephei variables, the red supergiants Mu Cephei, and VV Cephei A, both among the largest known stars, the binary star Omicron
  • Miaplacidus (Beta Carinae) Facts - The Nine Planets
    Miaplacidus (Beta Carinae) Facts Miaplacidus is an evolved giant star of spectral type A1 III, located at around 113 2 light-years 34 7 parsecs away from the Sun
  • Corona Borealis Constellation | Facts, Information, Mythology History
    Corona Borealis is a small constellation located in the northern celestial hemisphere It was one of the first 48 constellations listed by the Greco-Roman astronomer Ptolemy





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