Ursa minor is adjacent to () pentacle B Draco.

Ursa minor is the nearest north star to the north celestial pole, and Ptolemy and the modern eighty-eight constellations both include Ursa minor. Ursa minor marks the position of the north celestial pole. The brightest star in Ursa minor alpha is now Polaris, and the adjacent constellations are Draco, Deer Leopard and Cepheus.

Like Ursa Major, Ursa Major's tail can also be regarded as the handle of a bucket (or spoon), so it is called "Little Beidou": four of the seven stars form a ladle on the bucket, just like the Big Dipper. Ptolemy, an astronomer in the 2nd century A.D., incorporated Ursa minor into its 48 constellations, and since then it has become one of the 88 modern constellations. Traditionally, Ursa minor is an important navigation constellation, especially in navigation, because the first constellation in Ursa minor is Polaris.

Extended data:

Polaris and the Earth's Rotation Axis

The position of the earth's rotation axis in the sky is very stable, so people define the direction of the earth's rotation axis in the sky as south and north. Polaris is just in the direction of the earth's rotation axis, so in ancient times, when people sailed in the sea and trudged in deserts, forests and wilderness, they always turned to it to indicate the direction.

People worship it so much that China even regarded it as a symbol of ancient emperors. Even in today's highly developed science and technology, Polaris still has very important applications in astronomical measurement, positioning and many other aspects.

In fact, Polaris is not entirely in the North Pole. It is far from the North Pole 1, but there is no other star closer to the North Pole, so it is regarded as the nearby North Pole. If we stand at the north pole of the earth, the Polaris is directly above us.

In other parts of the northern hemisphere, people see that Polaris is always in that position due north. Moreover, due to the rotation and revolution of the earth, the constellations in the northern sky seem to revolve around the North Star every day and every year. In particular, the spoon mouth points to the big dipper of Polaris, and it never tires and never stops. The ancients in China were deeply touched by this and wrote in the Book of Changes, "Heaven is healthy, and gentlemen are constantly striving for self-improvement." If it makes sense.

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