Why are space agencies planning missions to Europa now?

Space agencies are planning missions to Europa now because they think there might be water under its ice, and maybe even life hiding there.

Imagine you have a pond in your backyard, and it's frozen over. You can't see the water beneath the ice, but you know it's still there, maybe even some fish are swimming around! Europa is like that frozen pond. It has a thick layer of ice on top, but scientists believe there’s liquid water underneath.

Scientists want to explore this hidden ocean because if there's water, there might be life, just like in Earth's oceans. They're sending robots to Europa now, it's a big step in the journey to find out if we're not alone in the universe!