Introduction of all-sky star map

At present, there are many kinds of all-sky star maps published in China. From the source, all kinds of star maps are basically copied from foreign original star maps; In content, the magnitude of various star maps and the number of deep space objects are also more or less due to different transcription versions; There are rotating star map, three-dimensional star map, star map fascicle and all-star map in form. There are color and black and white prints, and some electronic star maps. Some of these star maps are suitable for professionals' reference, some are suitable for ordinary astronomy enthusiasts to learn, and some are suitable for outdoor stars.

As far as ordinary astronomy enthusiasts are concerned, if they just want to know basic astronomical knowledge, or want to know some simple stars and constellations, a star map with a lower magnitude is more suitable, such as a rotating star map, because the number of stars in the star map is small, mainly bright stars, which are easy to find with the naked eye, and the rotating star map is not all day, but only the starry sky range that observers can see in all seasons. The disadvantage is that the star map is too small and simple, and a lot of astronomical information can't be displayed on the map.

If you are an astronomy enthusiast, you want to see the stars or do astronomical research, especially with the help of a good telescope. The magnitude of the star map is generally above 6, and there are many celestial bodies in deep space. A star chart similar to the century sky chart is more suitable, with magnitude 1 1 and so on. There are many celestial bodies in deep space, so it is convenient to carry them. The disadvantage is that the star map is detailed and informative.