If Earth had no atmosphere like the Moon there would be no scattering, and the sky would remain black, even in daylight ...

When the Sun is near the horizon, its light passes through a lot more of the atmosphere to reach the Earth's surface than ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Cerulean has been used in English since 1599 to label the colour resembling the blue of the sky. It was derived from the ...