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

Fire rainbows require specific conditions: cirrus clouds and sunlight at least 58° high in the sky. They're most visible in ...

Early on a clear November morning in the Mojave Desert, the sun is barely touching the peaks ... shaped mirrors as they concentrate sunlight on long steel pipes filled with circulating oil ...

If you look up on a clear day the sky is bright and you ... round from the dark into the sunlight. This means that the day is just beginning in Scotland and the Sun is rising in the sky.

At the Winter Solstice, the sun travels the shortest path through the sky resulting in the day of the year with the least sunlight and therefore, the longest night. In the lead-up to the Winter ...