With people going back to the moon it has been in the news about discussions concerning time on the moon. Whether the moon should have it's own time zone.
The only thing that makes sense is to use the moon's own time, not time relative to earth. Instead of time zones on the moon just use direct time, the position of the sun in the sky as measured with a sundial. The sun will rise at 6 AM, be directly overhead at noon, and set at 6 PM.
Of course the same side of the moon always faces earth. The moon revolves around the earth every 29 days so a day on the moon will last 29 earth days. As seen from earth the moon rises 50 minutes later each day and an earth day will last 50 lunar minutes.
As seen from the facing side of the moon the earth will always be seen in the same place in the sky. But it will go through phases just like the moon as seen from earth. This will make it easy to express latitude and longitude on the moon, by just describing where the earth is in the sky.
By the way one thing that I noticed and cannot see pointed out anywhere is that the phase of the moon, as seen from the earth, and the phase of the earth, as seen from the moon, must always add up to a full circle.
For more about the moon, here is a link to the compound posting about it.
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