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

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

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 ...

“This blue color is due to the high velocity of the meteors (about 41 km/s) and the presence of certain elements like magnesium and iron in the meteoroids, which emit blue light when they burn ...