This exotic-sounding term refers to the closest distance an orbiting body (held together only by its own gravity) can get to its parent planet before being torn apart by tidal forces. The Roche Limit is approximately 2.45 times the radius of the parent body. Also known as the tidal stability limit, but I think we can get more mystery and alternative meanings out of the name given it by the French astronomer Édouard Roche.
The number of Ferrero Rocher needed to make that pyramid. Not to be confused with the "Ferre limit" which is how many one can eat.
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