There is a cross in Ppt, so it can't move.

Maybe you locked the picture of the cross, so you can't move.

The Southern Cross, one of the constellations in the southern sky, is the smallest of the 88 constellations in the whole day, located in the Milky Way between Centauri and Musca. The main bright stars in the constellation form a cross shape, drawn down from the vertical part of the cross until a point about four times the length of this vertical part is the south celestial pole. You can see the whole constellation south of the Tropic of Cancer.

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. The second cross is a famous bright star in the southern sky, which is also a binary star. The third cross is the star of 1, which is 7 stars brighter than the star of 4.

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 part of this cross until a point about four times the length of this 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. 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.

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.