Comment Re:Jupiter has water (Score 1) 51
Yep, Jupiter has water, no doubt -- in its atmosphere. Juno is outfitted to find out the abundance of water in the atmosphere as a proxy for oxygen. They're not looking for water in relation to life. The oxygen abundance is a huge blank line in Jupiter's ingredient list. (Kind of embarrassing since it's the third most abundant element in the universe.) The Galileo atmospheric probe (1995) is presumed to have dropped into a dry area, and it didn't get a good measurement of water; Juno's going to make the measurement for the whole planet, from orbit. Most of the theories relating to Jupiter's formation (exactly how and at what distance from the sun) developed since the Galileo probe mission make predictions about the water/oxygen abundance, so Juno will gather the data and help determine which idea is likely to be closer to the truth. Or maybe none of them are right and new theories are called for...