In a previous post I commented that the Solar System is soaking wet.

Today we learned that there’s rain falling on Saturn.

OK, so it’s not exactly a downpour. The “rain” is water vapor that’s being sprayed into space by ice volcanoes on Enceladus, a tiny fraction of which ends up raining onto Saturn.

This discovery was made by the European Space Agency’s infra-red Herschel space telescope.