One of the 88 constellations: What does the Southern Cross mean?

Southern Cross, the southern constellation, lies between Centauri and Flies, and is the smallest of the 88 constellations in the whole day. You can see the whole constellation south of the Tropic of Cancer. This issue of 88 constellations takes you to understand the meaning of Southern Cross, one of the 88 constellations. Let's take a look at Bian Xiao!

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, which is drawn downward from a vertical position of the cross until a point about four times the length of this vertical position 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 of the Southern Cross, there is a dark dust nebula, which is like a dark cave in the Milky Way against the bright background, called "coal bag". Its area is almost as big as the cross, extending to the adjacent Centauri and Fly.

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