California company plans to place 4,000 "sky mirrors" in Earth orbit that will brighten skies over cities, alarming ...

We are going to continue our look at the atmosphere and energy transfer by looking at albedo and the reflection of solar ...

Add Yahoo as a preferred source to see more of our stories on Google. The sun shines above the Earth’s horizon. Perihelion, the point when Earth is closest to the Sun, occurs annually in early January ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Earth is today at aphelion, the point in its orbit at which ...

An eternal night seems like something out of a fairy tale, but it is an actual and regular event in certain areas around the ...