NASA’s astronaut, Nichole “Vapor” Ayers, has photographed a spectacular atmospheric event – a large red ‘jellyfish’ sprite soaring above a thunderstorm in North America. The striking image, taken from ...

The planet Jupiter has no solid ground – no surface, like the grass or dirt you tread here on Earth. There’s nothing to walk on, and no place to land a spaceship. But how can that be?

Why does Jupiter look like it has a surface – even though it doesn’t have one? – Sejal, age 7, Bangalore, India The planet Jupiter has no solid ground – no surface, like the grass or dirt you tread ...