What causes the bright blue sky during the day that completely drowns out the light from all other stars?
Answer
The Sun's light scattering in our atmosphere
During the daytime, the Sun, being an overwhelmingly bright star due to its proximity, floods the Earth's atmosphere with light. This intense solar radiation interacts with the molecules and aerosols present in the atmosphere, causing the light to scatter across the sky. This process of scattering results in the bright blue appearance that permeates the daytime sky. Consequently, this bright background uniformly washes out the comparatively faint light arriving from all other stars, rendering them invisible to the naked eye until the Sun drops below the horizon and the scattering effect subsides significantly.
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