Jupiter is a very big planet. It has many moons. One moon is Europa. Europa is very special. It has a big ocean! But the ocean is hidden.
The ocean is under thick ice. Scientists used a space tool. The ice is very deep. It is 18 miles thick! That is very, very deep.
Scientists want to explore the ocean. They think water is important. Maybe tiny life lives there! A new space ship will visit soon. It will arrive in 2030. This is so exciting!






