Starship 101

There has been a lot of talk over the last few years about looking for water on the moon.  Some feel that there could be a frozen lake in one of the polar craters that has never seen the light of day.  What is the big deal?  Do the astronauts want to go ice skating?

Hardly.  The main reason is that water can be turned into fuel.  Most of the cost of sending things into deep space is fuel.  It costs tens of thousands of dollars per pound to launch a rocket and most of the weight is fuel.  If a rocket could refuel on the moon, it would make deep space exploration less expensive.