Audio Guide：

In astronomy, we use "magnitude" to indicate the brightness of a star. The lower the magnitude, the brighter the star, and vice versa. One magnitude means a difference of 2.512 times in brightness. That means a 1st-magnitude star is 100 times brighter than a sixth-magnitude star, which is the darkest star that can be observed by the naked eye.

Visitors can compare the differences between various magnitudes by observing the brightness of the light on the display panel.