The following constellations are combined with the bright stars in the constellations _ The following constellations are combined with the bright stars in the constellations correctly.

One of the 88 constellations: the significance of the Southern Cross.

Introduction of the Southern Cross, one of the Southern Cross. The smallest constellation in the whole day. The Milky Way, located between Centauri and Flies, can only be seen in several southern provinces of China. The main bright stars in the constellation form a cross, and they are arranged downward from the vertical part of the cross until the point about four times the length of the vertical part is the south celestial pole. Observed at low latitudes in the northern hemisphere, the intersection of this extension line and the horizon is basically due south. Zheng He, a navigator in the 0/4th century AD/KLOC, used this constellation in his seven voyages to the Western Ocean. In Ptolemy's time in ancient Greece, it could be seen in the Mediterranean and was regarded as the foot of a centaur. Due to precession, in modern times, this part of the starry sky has moved south and can no longer be seen in most parts of the northern hemisphere. So it was not until the17th century that European astronomers took it out of Centauri as an independent constellation. The main bright stars in the Southern Cross constellation: Cross I (γ), Cross II (α), Cross III (β) and Cross IV (δ) form a cross. Because there are no bright stars near the South Celestial Pole, cross 1 and cross 2 are used to indicate the direction-only the distance between them is extended by about 4. Five times the south celestial pole. So this cross is as important in the southern hemisphere as Beidou in the northern hemisphere. In addition, the intersection of the middle vertical line connecting Nanmenxing Centauri and Marbury I and the above extension line will also be the south celestial pole. There are two bright stars next to the Southern Cross. They are Alpha and Beta Centauri, and they are the hands of the Southern Cross. If you find them, you can point out the Southern Cross. The meaning of the Southern Cross The part of the Milky Way where the Southern Cross is located is the brightest part of the Milky Way. At the lower left of the cross in the Southern Cross, there is a dark dust nebula against the bright background of the Milky Way. It is like a dark cave in the galaxy, called a coal bag. Its area is almost as big as the cross, extending to the adjacent Centauri and Fly.