Constellation Night
Why are circumpolar constellations seen all night long during the entire year?
Thanks so much!
The height of the Pole-star is 90 degrees minus your latitude on Earth, e.g. 50 degrees North means 40 degrees high. Since Earth’s rotation, all stars seem to go around the Pole-star, independent of the season, and all stars not further than 40 degrees from the Pole-star stay every night visible while they turn around that Pole-star.
Mostly they are the stars in South who are season dependent, because the Sun (and so the daylight) is going thru different constellations thru the year.
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