NASA and international partners are collaborating to establish a new timekeeping system for the moon, addressing the complexities of lunar time as astronauts prepare for future missions.

The fundamental issue with timekeeping is perhaps the most mind-boggling peculiarity of our universe: seconds pass by ever so slightly more quickly at the peak of a mountain than they do in Earth's valleys.

Practically speaking, most people don't need to be concerned about those distinctions.

How...