Earth's shadow follows the planet as it orbits the sun. You can get a sense of its enormous, awe-inspiring size by seeing this silhouette cast on objects ranging from satellites to the moon.

A new study using data from China's Chang'e-4 moon lander found an area of reduced radiation from cosmic rays near the moon.

When people on Earth watch a lunar eclipse, they see the Moon slowly move into Earth’s shadow and turn reddish for a short time. It is a familiar sigh.

This is when a so-called “blood moon” lunar eclipse plays out, visible in North and South America, parts of Africa, the ...