Seven stars reflecting crape myrtle

On a clear summer night, Sagittarius is bright and visible in the southern sky. What is more striking is that Sagittarius has six bright main stars, which form a "North-South Fight", which is beautiful and unique.

Nandou Six Stars: Martyr Star, Devil Star, Justice Star, Renxing Star, General Star and Magic Star.

The Big Dipper is in Ursa Major and the South Dipper is in Sagittarius. Purple MSI is the Polaris that we often say, and it is also the emperor star. When Polaris is due north, that is, when it passes through the meridian, Polaris passes through the meridian twice a day. But the real Polaris is a precession star, which moves between stars. The so-called age star is a phenomenon that the equinox retreats about 50 seconds on the ecliptic every year, and the earth axis takes the direction perpendicular to the ecliptic as the axis, with a period of about 26,000 years. On the celestial sphere, the north pole inserts a small circle around the yellow pole, which is mainly the result of the force exerted by the sun and the moon on the equatorial uplift of the earth, just like the fixed motion on the ecliptic. This result is tiring according to the times. Four thousand years ago, the North Pole was in Delta Star in Draco (right pivot), Beta Star in Ursa minor (emperor star) in the first two thousand years, and Alpha Star in Cygnus (Tianjin four thousand) in the last eight thousand years. Ancient sages looked up at the stars in the sky and changed the positions of the stars in Ursa Major and Ursa Minor to calculate a person's fate.