Sound as we know it does not exist in space. That’s because, on Earth, sound mainly travels to our ears via vibrating air molecules. Because space is a vacuum, meaning there is no matter at all ...

her mass would be just the same as on Earth - 55kg. Wherever she is, in space, on Earth, or even on Jupiter, she's still made of the same amount of stuff. But on Jupiter, she would feel much heavier.

For example, Jupiter is the most massive planet in our solar system. It’s so big, it could swallow 1,000 Earths. So it ...