[Scale: 8.7 x 10.6 miles. Smallest discernable feature: 44 yards across.]

We've Only Scratched the Surface

This detail of Europa's icy surface shows a prominent double ridge cutting across the landscape. Even though the ridge is over 1.6 miles wide, it stands only about 330 yards high, a mere scratch on an otherwise glass-like landscape. How can a moon that appears to be so active, be so smooth? Such questions intrigue and inspire us as we continue to explore Europa. Extended Caption