1.   A crescent moon showed occasionally which helped.

2.   A winter moon showed itself briefly before disappearing behind wind-hurried clouds.

3.   The moon shows no signs of concealed water, a new study says, disputing an earlier finding.

4.   The moon shows us only one face because it rotates on its axis in the same period that it orbits Earth.

5.   Two other moons of Jupiter show similar signs of oceans under ice layers.