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Rotation If you were an astrophotographer, what would be a good site to avoid tracking? The closest destination is the Moon with a rotation period of 27.2 days. That means the stars would move 27 times slower across the sky. The best planet with a surface would be Mercury at 58.6 days. That is more than twice as good. If you were willing to go farther you can go to Iapetus of Saturn, the slowest rotation for a moon. It's rotation period is 79.3 days. A bit better than Mercury. The very best place to go would be Venus with a rotation period of 243 days, a *3 improvement over Iapetus. Unfortunately, you can't see the night sky from Venus with its perpetual cloud cover. The best you could do is orbit Venus in a spacecraft or a very high balloon or wait for Venus to be terraformed (which may take awhile). Forward to Synchronicity |