Astronomy enthusiasts enter, ordinary people don't!

Of course it will change. It's just that this change is too slow and too small for us. So it is not easy to observe. But your statement that "the shapes and positions of the constellations in the sky we have seen since ancient times have remained basically unchanged" is not entirely correct. I found the Big Dipper on ancient rock paintings, which is very different from now. At first, I thought maybe the original painting skills were not at home. Later, the accurate observation and calculation results were surprising. The Big Dipper was like that tens of thousands of years ago! In addition, the star map drawn by Ptolemy in ancient Greece 2000 years ago is slightly different from the present one. After modern measurement, it is not his fault. So there is no doubt that the positions of all stars and galaxies are changing with each other. Of course, the shape of the constellation is also changing. I saw a model in Shanghai Science and Technology Museum. It shows the shape of the Big Dipper 654.38+ million years ago, now and 654.38+ million years later. ?

Hi ~? I found this photo: