With Juno exploring Jupiter, NASA is also intrigued by its largest moons. The Webb Telescope, set to launch in 2018, will be able to observe not only faint objects across the universe, but also all of our neighbouring planets and their moons within our solar system. Webb's angular and spectral resolution will allow us to observe these targets with unprecedented sensitivity and even follow geologic activity.
Io's intense geological activity makes it the most volcanically active world in the solar system, something Webb could potentially follow-up with. And NASA has selected nine science instruments for a future mission to investigate whether Europa -- a mysterious moon that scientists believe to have a liquid ocean beneath its icy surface -- hosts habitable environments. Hubble, with its suite of upgraded instruments, has captured Jupiter's auroras and found evidence of saltwater on Jupiter's largest moon, Ganymede. The mission has been extended another five years, and NASA expects it to continue to provide excellent science.
We will continue to monitor NASA’s other projects such as Cassini (to Saturn), New Horizons, Dawn Mission, Osiris Rex, and the upcoming Insight Mission to Mars.
CREDIT for Image featured at top http://www.space.com/33406-juno-jupiter-orbit-first-photo.html