This is what would happen if planets replaced the moon. Venus is almost the same size as earth. It would make the earth ...

In 2010 an astronaut on the ISS observed a bizarre phenomenon. When he glanced out the window, he saw the Moon looked ...

The questions kids ask about science aren't always easy to answer. Sometimes, their little brains can lead to big places adults forget to explore. With that in mind, we've started a new series called ...

Many of the most interesting bodies in our Solar System aren’t planets, but the moons that orbit them. They have active volcanoes, hydrocarbon oceans, geysers, and moon-wide oceans buried under icy ...