What is Polaris?

The name of the constellation is a symbol of the northern sky. Ancient astronomers admired Polaris very much, thinking that it was fixed and all the stars revolved around it. Polaris belongs to Ursa minor, about 400 light years away from the earth. It is a star with stable brightness and position that can be seen in the night sky. Because Polaris is closest to true north, people on earth have been navigating by its starlight for thousands of years.

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Basic information

symbolic meaning

location

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function

Polaris brightness level

The secret of Polaris's immobility

companion star

Ways to find Polaris

Polaris and China Traditional Culture

Related English vocabulary

Polaris all-terrain vehicle

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symbolic meaning

location

replace

function

Polaris brightness level

The secret of Polaris's immobility

companion star

Ways to find Polaris

Polaris and China Traditional Culture

Related English vocabulary

Polaris all-terrain vehicle

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English name: Polaris, Polaris, Polaris Ursa minor α, also known as Polaris or purple MSI. Polaris is a bright star in the northern part of the sky, very close to the north celestial pole, almost opposite Polaris.

The earth's axis, viewed from the earth, has almost the same position and can be used to identify the direction. Due to precession, Polaris is not an eternal star. Now it is Alpha Ursa minor, and it will be Vega in the year of 14000. Every 2000 years, Polaris will cycle once. For example, during Magellan's voyage, Polaris was about 8 degrees from the north celestial pole. Today, Polaris is closer to the north celestial pole with an angle difference of only 40'. According to the calculation of the earth's axis swing and stellar gravity, by 2 100, Polaris will reach the nearest position directly above the north celestial pole, only 28' away from it, and then it will gradually move away from the north celestial pole. Polaris is now in the sky, pointing to the north pole of the earth. Therefore, it always seems to be in the northern sky. It is because of its important position that it is famous. In fact, according to the brightness, it is just an ordinary second-class star, belonging to "Little Three". It is about 400 light years away (that is, the light from the Polaris we see). Polaris is the brightest star in Ursa minor, also known as Alpha Star in Ursa minor. It is an F-type high luminosity star with late spectrum, about 400 light years away, and its mass is about five times that of the sun. It is the brightest star closest to the earth and is at the tip of the bear's tail in the constellation diagram.

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It is precisely because the position of the North Star is relatively stable and unchanged that it gives people a sense of loyalty and has its own position. From the perspective of life, Polaris has the significance of leading us to our goals, just as it can tell us the direction. From the perspective of love, Polaris symbolizes firmness, persistence and eternal protection. If it is anthropomorphic, then it must have a promise to the stars near it, otherwise it will not stick to the guardian, such as the moon. Although they are far away, Polaris is still guarding. So Polaris is firm, symbolizing that it will never change! Polaris once said to the earth, "If you get lost, look up at me, and I will wait for you here forever." So people who get lost will look up at the North Star.

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The Big Dipper is a part of Ursa major. Graphically, the Big Dipper is located at the back and tail of Ursa Major. Of these seven stars, six are secondary stars and one is tertiary. Through the connection of the two stars in the mouth of the bucket, it extends about 5 times in the direction of the mouth of the bucket and finds the Polaris. "Star Recognition Song" has: "Star recognition begins with Beidou, and then begins from north to west." Beginners can look for other constellations in turn from the Big Dipper. Because the earth's axis of rotation will swing periodically for about 2600 years, the North Star in the Arctic.

Polaris is not fixed (always alpha Ursa minor). About 4800 years ago, Polaris was the alpha star of Draco. Until the year 2000, the angle between Alpha Ursa minor and the North Pole will become the smallest (only 28'38 "). In 4000 years, Cepheus Gamma will become the North Star. Around 14000 BC, Alpha Lyra (Vega) became the North Star. Polaris is a very important indicator of field activities and ancient navigation direction, and it is also a constellation that can tell the direction from small to stargazing to large to astrophotography, and the equatorial observatory in the observation room accurately locates it. Polaris (Gouchenyi) is also a three-in-one system. The distant companion star (Polaris B) can be clearly observed with a small telescope. The nearby companion star (Polaris) is too close to Polaris (the apparent distance is only 0.2 ",but the actual distance is 18.5), so it is too dark to see. It was not until early August 2005 that Hubble captured its image. Polaris is now very close to the north pole of the earth in the sky. Therefore, it always seems to be in the northern sky. It is because of its important position that it is famous. In fact, according to the brightness, it is just an ordinary second-class star, belonging to the "younger generation." It is more than 300 light years away from us. Polaris belongs to the brightest star in Ursa minor, also known as Alpha in Ursa minor. On the constellation diagram, it is on the tip of the bear's tail.