Tomorrow morning the Galileo probe will take its last photos in a low-altitude flyby of Io. It’s due to crash into Jupiter in early 2003 so it doesn’t accidentally land on Europa, which has the best chance of any of the Jovian moons to contain life, and contaminate it with bacteria. I’m looking forward to seeing the photos; as I’m married to an Italian-American woman, there’s always been something amusing to me about a planet that looks like a pizza from hell.