2024-04-05 09:33:23
Moon Astronaut
Earlier, the White Houseissued a policy memo, instructing NASA to create a new standard time for the moon by 2026. This time will be called Lunar Coordinated Time (LTC) and corresponds to Earth’s Coordinated Universal Time (UTC). It will establish an official timing reference to help coordinate future lunar missions, especially cross-border cooperation. The launch of this policy coincides with the start of a new round of space race between the United States, China, Japan, India, Russia and other countries, so it is difficult to say whether the various camps will agree to adopt this as the only standard.
The memorandum directs NASA to work with the U.S. Departments of Commerce, Defense, State, and Transportation to jointly plan a schedule to implement the Lunar Coordinated Time by December 31, 2026.As for international cooperation, it is more difficult to say. At present,Artemis ProtocolThe 31 contracting countries, including Japan, the European Union, and India, are more likely to join, but neither China nor Russia has participated in the agreement.
It is not that simple to design a “time zone” for the moon. Einstein’s theory of relativity shows that time changes with speed and gravity. Taking into account the Moon’s weaker gravity and the speed difference between it and the Earth, a “second” on the Moon is slightly shorter than on Earth. Therefore, if the earth clock is used on the surface of the moon, it will be 58.7 microseconds ahead of earth time every day, which is not a small number. As the United States and other countries plan to advance lunar missions to conduct research, exploration, and even eventually build permanent residential bases, how to eliminate this time difference, or at least ensure that there is a conversion method for the moon and the earth that everyone can agree on, is to conduct bilateral Indispensable for time synchronization and performing tasks that require precise timing.
The White House hopes that LTC can correspond to UTC, and also hopes that LTC can maintain autonomous operation when it loses contact with the earth, which means that lunar time will not be updated solely by earth time. In addition, the White House also hopes that the LTC infrastructure can also be expanded to the space environment “beyond the Earth-Moon system” and be suitable for future trips to Mars or other stars in the solar system to avoid future expansion due to incompatible time systems. Causing confusion.
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