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The moon could get its own time zone. But clocks won’t work the same as they do on Earth.

Pacific Time, Eastern Time, Greenwich Mean Time — and one day, perhaps, Moon Time?

Time in space is usually calculated based on the time on Earth, but as different nations plan to operate on and around the moon, it may require a universal method for lunar timekeeping.

A standard, agreed-upon time zone for the moon will not only ease collaboration between space agencies around the world, but could ensure more precise guidance and navigation on the lunar surface.

There are, however, some significant hurdles, according to European space officials. For one, it’s not yet clear if a single space agency should be responsible for establishing and maintaining “moon time.” And if a new time zone is created, should it be tied to time on Earth, or function as its own thing entirely?

There are also debates about how to even figure out lunar timekeeping. Clocks on the moon gain roughly 56 microseconds per day (one microsecond is equal to one-millionth of a second), making them tick ever so slightly faster than clocks on Earth.

These tiny shifts also vary depending on location, which means clocks on the moon don’t necessarily run at the same rates as clocks in lunar orbit.

“Of course, the agreed time system will also have to be practical for astronauts,” said Bernhard Hufenbach, who works in ESA’s Directorate of Human and Robotic Exploration.

But beyond astronauts and ground controllers being able to tell time on the moon, the need for standard timekeeping in space is also essential for guidance and navigation.

Just as GPS systems on Earth require precise coordination and timing, so too will any infrastructure that is built and operated on the moon.

Typically, missions to the moon use deep space antennas to keep onboard systems synchronized with time on Earth, but European space officials say this method may not be sustainable as humans establish a more permanent presence on the moon.

In November, space officials gathered at the European Space Research and Technology Centre in the Netherlands to discuss priorities moving forward.

“During this meeting … we agreed on the importance and urgency of defining a common lunar reference time, which is internationally accepted and towards which all lunar systems and users may refer to,” Pietro Giordano, a navigation system engineer at ESA, said in a statement. “A joint international effort is now being launched towards achieving this.”

Denise Chow is a reporter for NBC News Science focused on general science and climate change.

Category: Science

Source: NBC Science

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