Video: Nasa plan mission to Jupiter moon
Nasa scientists have drawn up plans for a mission to Europa - a moon of Jupiter.
The mission would travel to Europa to search for life in the oceans that exist under its thick layer of ice.
A probe could be ready in 2021 but could take almost six years to get there depending on the rockets used.
It's wouldn't be cheap either - scientists say it could cost £1.3 billion.
At the moment Nasa are still concentrating on exploring Mars.
Last week Nasa's Curiosity rover drilled its first hole into the planet's surface to begin an examination of the soil.