"Significant amount" of water...

found on the Moon in the debris plume generated by the LCROSS impact last month. Although the event was a visual fizzle, it is clear that the mission is returning huge scientific results. How much water was liberated in the impact?

"Based on the measurements, the team estimated about 100 kilograms of water in the view of their [two spectrographic] instruments — the equivalent of about a dozen 2-gallon buckets — in the area of the impact crater (about 80 feet, or 20 meters across) and the ejecta blanket (about 60 to 80 meters across), Colaprete said."

This is particularly amazing: the water ice volatilized in the ejecta may be billions of years old.