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.

NASA launched a lunar orbiter Wednesday night that will trace the Moon's elusive water cycle. Lunar Trailblazer, a collaboration between NASA, Northern Arizona University, and Lockheed Martin Space, is now on a meandering path toward the Moon's orbit,