Audio Guide：

The Sun that we usually see is its appearance under the wavelength of visible light; however, it looks completely different under other wavelengths. For example, with visible light, we can see the solar photosphere, which is the Sun’s atmosphere. With X ray, we can observe the corona surrounding the Sun. With radio waves, we can see the zone of active ions on the Sun’s surface. By observing different electromagnetic wavelengths, we can observe and study the solar activities and changes on the Sun’s surface.