The positional relationship between Orion and the Big Dipper.

The Big Dipper hangs in the northeast sky, and Orion hangs in the southwest sky.

The difference between right ascension and right ascension is not small, but the right ascension of Beidou is very high and can be observed for a long time, so there will be no phenomenon that "friends meet each other like the stars in the morning and evening". It is easy to find the well-known Big Dipper in the northern night sky. It is shaped like a spoon. Polaris in Ursa minor belongs to Ursa minor and is the brightest star (second-class star).

March to May is spring every year. Take the starry sky seen at eight or nine o'clock in mid-April as an example. At this time, you will see the bucket handle of the Big Dipper pointing to the 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 mid-June of 5438+00 as an example. At this time, the Big Dipper has reached the northern 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.

Sun constellation

The original Babylonians made a star chart of the four seasons according to the stars, hoping to use it to predict the fate of the country and people. The sun sign is the most frequently mentioned in astrology. As long as you know a person's date of birth, you can find out his sun sign. The orbit of the sun is called the ecliptic, and it is divided into 12 zones, each of which is 30 degrees. These 12 regions are what we call solar constellations.

The twelve constellations start in spring, that is, they are sorted when the sun runs to the vernal equinox around March 20 every year. Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, Pisces, everyone belongs to only one sun sign.