There's lots of water on the moon for astronauts. But is it safe to drink?

An illustration of the moon with a target zone filled with colors. each color represents concentrations of hydrogen. above are two spacecraft tracks as they move above the surface.

Water appears to be abundant near the moon's south pole, but drinking it could be a safety problem for astronauts.

A new moon challenge asks the public for ideas to purify drinking water for astronauts, reducing the need for shipments from Earth. The Aqualunar contest is open to residents of Canada and the United Kingdom, and you can send in your ideas right now, through April 8.