Is the North Rush Gate north or south?

Bayer: αPsA

Constellation name: South Fish.

Right ascension: 22 hours 57 minutes 38 seconds

Declination:-29 37'

Brightness: 1.2 magnitude

Distance to Earth: 25. 1 light-year.

Beiluoshimen [1], belonging to Gong Beixuan Wu, is the main star of Pisces (Alpha Pisces), about 25. 1 light-year away from the earth. The apparent magnitude on the earth is 1. 16, which is the17th bright star that can be seen on the earth except the sun.

The spectral classification of Beiluoshimen is A3V, its diameter is about 1.7 times that of the sun, its mass is about 2.3 times, and its brightness is about 15 times. It is only about 200 million to 300 million years old and is a very young star.

Around Beiluoshimen, there is a disk-shaped dust cloud at the distance of 133 to 158 astronomical units. 1998, through observation and speculation, people think that planets are likely to be produced in dust clouds.

There is a known planet in North Fukushima, Nobukuro Shimen B. In May 2008, astronomer Paul Callas of the University of California, Berkeley successfully located the planet from photos taken by the Hubble Space Telescope between 2006 and 2008. The image of this planet was released on June 5438+065438+1October 65438+March 2008, and it is also the only extrasolar planet discovered by optical means. The size of Beiluoshimen B is similar to Jupiter, and its mass is between 0.054 and 3 times that of Jupiter, between Neptune and three Jupiter. The distance from Beiluoximen B to Beiluoximen is about 654.38+0.7 billion kilometers, which is about 872 years in period of revolution.

[Edit this paragraph] Beiluo Shimen

It is the main star of Pisces (Alpha Star of Pisces), the brightest star in the whole day, with apparent magnitude 1. 16, absolute magnitude of 2.03 and a distance of 22 light years. Beiluoshimen gives people a moist feeling and is a 3V-shaped white main sequence star.

The north gate of Chang 'an is called the north gate, which means the military gate, and the north gate means staying in the north. Another way of saying it is that the north gate of ancient Chang 'an is called the north gate, and the north gate refers to the north gate. Ancient Arabia was called Beiluoshimen Fomalhaut, which means "fish mouth".

In the autumn sky, Beiluo Shimen is a lonely star with no brighter stars around. It is the southernmost bright star that can be seen in most parts of China (while Lingnan is an old star).

In the southern sky in autumn night, Tusi Sky is the brightest except North Rushmen. In the area of Guangdong and Guangxi, you can also see a star water commission 1 brighter than Beiliu Shimen.

In ancient Persia, Shimen in Beiluo, Bisuwu, Antares and Xuanyuan XIV were called the four heavenly kings, mainly because they were close to the ecliptic and almost evenly distributed on the ecliptic.

The diameter of Beiluoshimen is about 1.7 times the diameter of the sun, the mass is about 2.3 times, and the brightness is 15 times. It is only about 200 million years old and is a very young star.

A circle of disk-shaped dust clouds surrounds Beiluoshimen, extending from 5 astronomical units to 90 astronomical units away from the star. 1998, through observation and speculation, people think that planets are likely to be produced in dust clouds.

[Edit this paragraph] Records in the astronomical history of China.

"Jin Shu Tian Wenzhi": "A star falls in the north and is in the southwest of Yulin. Those in the north will stay in the north; Falling, the sky is falling; Teacher, male also; As a teacher, you are also a military school. The north gate of Chang 'an is called the North Gate. It is like this. "

Stay in the north: located in Gong Bei; Autumn: Chai Men, Luobamen.

Historical Records Tianguanshu: "There is a big star next to it, which falls in the north". Miao Meng was quoted in Kaiyuan Zhan Jing as saying, "There is a big red star in the southwest of Yulin, which looks like a big horn. The gate of the heavenly army is also called Beiluo, a master."

"Justice in Historical Records": One star falls to the north, the feather forest is southwest, the gate of the heavenly army, and the gate falls to the north of Chang 'an, and that's it.

It can be seen that this star was originally called Beiluo, or Master (because it is close to the door), and Li and Zhang Shoujie took the North Gate of Chang 'an as an example. The combination of "Northern Expedition+Master" originated from the usage in Sui and Tang Dynasties.