Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Stars often whip their planets with solar winds and radiation, pull them ever closer with gravity and sear them with heat.

Concept image of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri. ESO/M. Kornmesser. This confusion doesn’t only exist among members of the public.

Jupiter, the fifth planet from the Sun, is between Mars and Saturn. It’s the largest planet in the solar system, big enough for more than 1,000 Earths to fit inside, with room to spare.. While the ...

Earth, Mars and Venus all looked pretty similar when they first formed. Today, Mars is dry, cold, and dusty; Venus has a hot, crushing atmosphere. Why did these sibling planets turn out so different?

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?