What season does the Big Dipper appear every year?

March to May is spring every year. Take the starry sky seen at eight or nine o'clock in the middle of April as an example. Then you will see the Big Dipper bucket handle pointing east. June to August is summer every year. Take the starry sky seen at eight or nine o'clock in mid-July as an example. At this time, the bucket handle of the Big Dipper points to the south. September ~ 165438+ 10 is autumn every year. Take the starry sky seen at eight or nine o'clock in the middle of 65438+ 10 as an example. At this time, the Big Dipper has come to the north at low altitude. Generally speaking, it is not easy to see the Big Dipper in the area south of the Yangtze River valley in China at this time. However, please rest assured, you have to realize that there is still an "assistant" to replace the Big Dipper, and that is the Hou Xian constellation. At this time, the constellation Xianhou appeared above the head. Its main bright star forms a W-shape. You can also find Polaris by extending the connection between Alpha and κ. Every year from February 65438 to February of the following year is winter. Take the starry sky seen at eight or nine o'clock in the middle of June 65438 as an example. Although the weather is cold in winter, the bright stars in the starry sky in winter night are more magnificent than the other three seasons. At this time, the Big Dipper has reached the northeast sky, and bucket handle points to the north. The center of the winter night sky is Orion, which appears in the southern sky. Ancient Greek mythology imagined Orion as a brave hunter.

The names of these seven bright stars are: Shu Tian, Tian Xuan, Tianji, Tian Quan, Yuheng, Kaiyang and Yaoguang. The first four stars are called "Dou Kui" or "Xuan Ji"; The last three stars are called "bucket" and "bucket handle". These seven stars are α, β, γ, δ, ε, ζ, η in Ursa major, and the other six stars are all second-class except the celestial force δ. The line connecting Tian Xuan β and Shu Tian α is about five times longer, and Polaris can be found. Therefore, beta and alpha stars are also called "Polaris".

Shu Tianxing: Ursa Major.

Western name: dubhe Bayer letter: Alpha Ursa major

Value: 2.00

Location (year J2000.0):

Right ascension:11h03m43.70s.

Declination:+6145' 03.2 "

Height: 54 12' 33 "

Azimuth: 048 49' 51"

U2000: Chart 24, Volume 1

Transfer: 04h 33m 1 1s

Tian Xuan

Constellation: Ursa Major

Western name: Melak

Bayer letter: beta Ursa major

Value: 2.40

Location (year J2000.0):

Right ascension:11h01m50.49s.

Declination:+56 22' 56.6 "

Height: 52 25 ft 3 1 inch

Azimuth: 057 19' 13 "

U2000: Chart 46, Volume 1

Transfer: 04h 3 1m 18s.