How far is Ursa Major from the Earth?

What stars are there in the Big Dipper? How far are they from the earth?

What stars are there in the Big Dipper? How far are they from the earth? What are the secrets about the Big Dipper? I'm afraid few people are clear about these problems. First of all, they are all located in the Milky Way. Like the sun, they are just one of the billions of stars in the Milky Way. Do you know how big the Milky Way is?

Scientists say its diameter is at least 654.38+600,000 light years. Relatively speaking, the distance between the star Dachuan and the earth seen by naked eyes in the night sky is no more than 654.38+0.000 light years. According to the archaeological discovery of Heluo ancient country, more than 5,000 years ago, there were two stars on the bucket handle of the Big Dipper, named Zuo Fu and Youbi respectively, so there was the saying of nine planets.

Unfortunately, the light of these two stars became dim, and finally only the Big Dipper was left. They are bigger and brighter than the sun. Yes, they burn quietly in the universe like the sun.

This is Eta Ursa major, the seventh star of the Big Dipper. It is also called Pojun or Ursa Major η. It is about 104 light-years away from the earth. In the Big Dipper, except Shu Tian and Tian Xuan, which we will mention later, all the other stars belong to the prime number stage, that is, the main sequence star stage, and Eta Ursa major is the youngest. Its age is about 1 10,000 years, but its surface temperature can reach10.5 million years.

This is Kaiyang, the sixth star of Beidou. It is called Wu Qu or Ursa Major, and it is 78.2 light years away from the Earth. Its mass is about 2.2 times that of the sun. Sometimes, you can find it with the naked eye. Near Kaiyang, scientists discovered 1 dim star. In fact, we can also find four stars in this area.

This is the first bright star in the Big Dipper: Yuheng, also known as the constellation Ursa Major, which is 83 light years away from the earth and has a mass of about 2.9 times that of the sun. Although it is really impossible for this star to beat Shu Tian in luminosity, Yuheng is the brightest star in the Big Dipper because of its distance advantage.

This is the darkest star in the Big Dipper: Tianquan, which is 865,438+0 light years away from the Earth. It is also called Ursa Major δ, and it is actually a "wenqu star" with the mass of 1.63 times that of the sun, and it is the smallest star in the Big Dipper. However, it has two companion stars, namely the adjacent δ star B in Ursa major and δ star C in Ursa major, which means that it is a ternary star system.

Apocalypse is the sixth bright star of the Big Dipper. Its mass is about 2.6 times that of the sun. It is called the constellation Ursa Major γ, which is 84 light years away from the Earth. It is the third star in Spoon's mouth, and it has a companion star with a luminosity about 65 times that of the sun.

This is Tian Xuan, 80 light years away from the earth. Today, Tian Xuan's core "hydrogen fuel" has been basically exhausted, and its mass is about 2.7 times that of the sun.

This is Shu Tian, also known as Wolf Greed or Alpha Bear. Its mass is 4.25 times that of the sun. In fact, Shu Tian is also the farthest star in the Big Dipper, about 123 light years away from us, but Shu Tian is still the second brightest star in the Big Dipper. Now, the red giant Shu Tian has entered the old age, and scientists can't accurately measure its volume, but its radius is definitely much larger than the sun.

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