Northern circumpolar constellations
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Northern Circumpolar Constellations. What does circumpolar mean?. to circle around the pole- or North Star. daily trace circles around the north celestial pole, without setting or dipping below the horizon. move in a counterclockwise direction.

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What does circumpolar mean
What does circumpolar mean?

  • to circle around the pole- or North Star.

  • daily trace circles around the north celestial pole, without setting or dipping below the horizon.

  • move in a counterclockwise direction.

  • On any given night, the constellation is visible during a portion of the circle; the rest is traced out when the constellation is hidden in the daylight sky.



Circumpolar constellations
Circumpolar Constellations:

  • Ursa Major, the Big Bear (includes the Big Dipper)

  • Ursa Minor, the Little Bear

  • Cassiopeia, the Queen of Ethiopia

  • Cepheus, the King of Ethiopia

  • Draco the Dragon




What is it an asterism
What is it? An ASTERISM

  • The Big Dipper and Little Dipper are part of two other official constellations

  • The Great Bear and Little Bear respectively.

  • They are a familiar, but unofficial grouping of stars.



Why is polaris so important
Why is Polaris so important?

  • it stays relatively fixed in the heavens while all of the other stars move in circular arcs throughout the night.

  • In the past, it has been called ‘the ship star’, ‘the leading star’, ‘star of the sea’ and the ‘steering star’

  • Native Americans called it the ‘nail of the sky’.




Does precession effect the pole star yes
Does Precession effect the Pole Star? YES!!

  • The Earth is like a spinning top.