Europa, the sixth-closest moon of Jupiter, was first discovered by Galileo Galilei. Galileo spotted the icy moon, which sits 390,400,000 miles from Earth, on January 8, 1610. Europa is the 4.5 billion-year-old moon of Jupiter covered in icy oceans and significant cracks, which scientists believe could possibly be the result of flowing water.
Share the knowledge!
Written by Curiosity Staff February 21, 2015
Wake up with the smartest email in your inbox.
Our best articles a few times a week.