On this day in space! Nov. 5, 2002: NASA's Galileo spacecraft flies by Jupiter moon Almathea only to find it's a 'pile of icy rubble less dense than water'

On Nov. 5, 2002, NASA's old Galileo spacecraft was almost out of fuel. But the Jupiter mission still had some science to do. Galileo flew by a small moon called Amalthea. Amalthea is small, but it's interesting for scientists.

The Jupiter moon Amalthea is the reddest object in our solar system. It also generates more heat than it gets from the sun. Scientists think Amalthea creates electrical currents as it orbits in Jupiter's huge magnetic field. Near this little moon, strong radiation from Jupiter is dangerous for spacecraft.

The flyby caused some problems for Galileo. The spacecraft went into safe mode only 30 minutes after going past Amalthea. NASA said it was ready for problems, because Galileo was on its last...