Audio Guide：

Transit photometry is currently an important way for astronomers to discover extrasolar planets. When observing a star, if an exoplanet transits (crosses) in front of the parent star, the star’s observed brightness will be slightly reduced because it is blocked by the planet. The level of reduced luminosity depends on the size of the planet. This method is called transit photometry and allows us to estimate the size of the exoplanet, whether the planet possesses an atmosphere, and the atmosphere’s composition.

You can simulate the phenomenon observed when an exoplanet crosses its parent star using the demonstration model.