This picture that you see above is a picture of Adrastea.  Adrastea is the smallest moon of Jupiter 

Adrastea is one of Jupiter's moons and is the second closest to Jupiter.  It was discovered by D. Jewitt and E. Danielson in the year 1979.  Adrastea was the daughter of Jupiter and the giver of rewards and punishments.  Adrastea lies within Jupiter's main ring and is probably the main source for material in this ring.  
Fast Fact:  Adrastea is not one of the four largest moons of Jupiter.  In fact, it is the smallest.  We chose it partly for this reason.