"Some of these features are surprisingly dark compared with their icy surroundings, earning their nickname of 'cryptic terrain.'" When you purchase through links on our site, we may earn an affiliate ...

"We're squeezing the last bit of science we can from Voyager 2's images." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Over the last few ...

The moon's thin atmosphere, called an exosphere, has been a puzzle to science for some time. Two main processes were thought to create this wispy gas envelope; tiny meteoroids hitting the surface and ...