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Search options questions only not deleted user 879

This tag should be used when asking questions about solar or lunar eclipses in our world or in a fictional world.

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A self-eclipsing orbital ring

In this way the ring eclipses itself. This can be seen towards the end of the gif. In an eclipse, the term “umbra” refers to the area totally eclipsed from the sun. …
Mike Nichols's user avatar
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