In this image we can see a celestial boreal map. The northern sky is called the sky visible from the northern hemisphere.
The celestial maps show on a flat surface what we can observe in the sky. This will depend on the latitude we are in, the month and the time of observation.
The reference of the boreal sky, and center of its celestial map, is the Polar Star or Polaris. It corresponds roughly to the geographical north, although it will not always be that way, since both the Earth's axis and the stars move. In 2.012 it will reach its minimum distance with the celestial north pole; Then, it will move away again. Polaris belongs to the constellation of the Little Bear. It is easy to locate by drawing an imaginary straight line from the two brightest stars of the Car (Merak and Dubhe), within the constellation of the Big Dipper.
The stars closest to the center of the map are called circumpolar, and can be seen throughout the year, but only in one hemisphere. The areas located on the edges of the map correspond to the equator and are only seen in certain months. These can be seen from both hemispheres, but they will appear to be face up in the northern sky and face down in the southern sky.
Other constellations typical of the northern sky are Cassiopeia (with its characteristic "W" shape), Leo Minor, Dragon, Cepheus, Giraffe and Triangle.
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