The first close-up images of Io since NASA’s Galileo mission in 1997 revealed the emergence of a fresh volcano with multiple lava flows and volcanic deposits covering an area of about 180 ...

Galileo was 990 miles away from Gaspra when it whizzed by, and it was travelling at a relative speed of about 5 miles per second. The spacecraft took several photos of the asteroid and used an ...

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 legs, and the radiation near Amalthea was strong.