It is also continuously in the sky throughout the day; however, it is not that visible because of the glare of the sun. Group 1: Ursa Major, Ursa Minor, Draco . Review Questions: 1. A circumpolar star is a star that, as viewed from a given latitude on Earth, never sets (that is, never disappears below the horizon), due to its proximity to one of the celestial poles. All stars visible from the equator are not circumpolar. Declination ≥ 90 - latitude of the observer Therefore: All stars visible from the North pole are circumpolar. Circumpolar constellations are constellations that never set below the horizon when seen from a particular location on Earth. The Big Dipper and the W-shaped constellation Cassiopeia circle around Polaris, the North Star, in a period of 23 hours and 56 minutes. For example, if you were stood at the Earth’s north pole you would be able to see all stars above (to the north) of the celestial equator, but none of the stars or constellations below. This is because they are near to one of the celestial poles. They can be seen in the night sky throughout the year, while other constellations are seasonal, visible only at certain times of year. How many circumpolar stars appear in your sky depends on where you are. A star that can be viewed from specific latitude on Earth that is visible for an entire night and for every night of the year is called a circumpolar star. The North Star it is a "pulsing" star, a Cepheid variable, which appears to vary in brightness ever so slightly – only one tenth of a magnitude – over a time frame of just under four days. A circumpolar star or constellation is one that is visible all the year round from any particular location on the Earth’s surface. We have seperated them into two groups. Choose from 500 different sets of term:stars set = circumpolar flashcards on Quizlet. Learn term:stars set = circumpolar with free interactive flashcards. At the Earth’s North and South Poles, every visible star is circumpolar. A star is only circumpolar if its declination is equal to or greater than 90 - the latitude of the observer. The circumpolar stars appear to lie within a circle that is centered at the celestial pole and tangential to the horizon. Ursa Major is circumpolar from Ames, Iowa (42oN Latitude). There are five constellations that we consider as being circumpolar. Long-exposure photography of stars allows us to see the movement of stars over long periods of time. Click on the two links below to access the constellations. Group 2: Cassiopeia, Cepheus . Circumpolar Stars.