Looking for the Southern Cross along the Milky Way is one way. In the center of the Milky Way, there is a black spot embedded in the shining cluster. This black spot is called "coal bag". On one side of the coal bag is the Southern Cross, and on the other side are two bright Polaris.
The longer one along the intersection line extends forward about 4.5 times the imaginary distance, and then falls vertically. Remember the obvious marks on the horizon, or place two crossed wooden sticks near the landing site, so that you can remember the direction of the day.
The part of the Milky Way where the Southern Cross is located is the brightest part of the Milky Way. Its center position: right ascension 12: 20, declination -60 degrees. Although the Southern Cross is small, there are many bright stars. Alpha star is a famous bright star in the southern sky and a binary star. The beta star is a second-class star, with seven stars brighter than the fourth-class star.
The main bright stars in the seat, cross I (γ), cross II (α), cross III (β) and cross IV (δ) form a cross. Draw down from the vertical bottom of the cross until a point about four times the vertical length 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. Because there are no bright stars near the south celestial pole, cross I and cross II are used to indicate the direction-only by extending the distance between them by about 4.5 times is the south celestial pole. This cross is no less important in the southern hemisphere than Beidou in the northern hemisphere.