We tend to think of the moon as a cold, dusty rock, but in fact, its surface can get pretty hot during a lunar day. How hot? It turns out that the answer can vary dramatically over a very short ...

Lunar Trailblazer, an orbiter that shared a launch on Wednesday with the commercial Athena lander, will help scientists understand where the moon’s water is, and what form it takes. By Kenneth ...

That water could take several forms, including water within the moon, water brought by comets and asteroids over time and water developing on the surface caused by solar wind plasma. Scientists ...

Another source might be comets or meteorites, which may have delivered water to the moon over billions of years. The exact amount of lunar water remains uncertain, but NASA estimates it is ...