by ICN5D » Sun Feb 23, 2014 3:26 am
Well, that depends on relative size in the sky and orbital speed. A 2D moon will have a 1D edge facing the 2D sun and planet. The radius of the moon would make what's called an "apparent size", where if closer, it would simply look bigger. It's pure coincidence that our moon is just about the same relative size as our sun. Crazy think is, the sun is roughly 420,000 times wider than the moon, but the sun happens to be roughly 420,000 times further away. The larger size is compensated perfectly by its distance. A larger 2D moon at the same distance would make a longer eclipse, a smaller one is shorter. But, of course as mentioned at the beginning, a smaller 2D moon that moves slower will still make for a longer eclipse. Now, if the moon is much smaller in the sky, relatively speaking, you would get a partial eclipse. The same size or larger makes a total eclipse, that is, complete obstruction. Smaller would still be in front of the sun, but the outer portion of the moon would have sun exposed all the way around.
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