The Juice space probe will fly 20 miles above the icy moons of Ganymede, Callisto and Europe. On board there are ten different instruments and one of them has been designed by radio astronomer Eva Wirström.
The moons were discovered as early as 1610, when astronomer Galileo Galilei pointed his telescope at the sky and drew them.Listen to Eva W KirströM talk about why the moon Europa is so interesting to astronomers in the clip above..