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I come bearing gifts of knowledge Nebhead Send a noteboard - 02/08/2014 07:54:07 PM

If you want something to be seen 800 miles away, it needs to be about 80 miles tall. That's at the horizon though, not above rooftops. I'd add another 50%.


A 10 mile diameter clockface would be visible but pretty small at 800 miles.


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It's all my fault...
Vegas Aug 17-18 - A Night to Remember

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