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E.L.E. - Imminent impact - i.e. the area of a spherical cap

Author:
a.zampa
What is the probability that a meteorite falling on the surface of the Earth, hit a certain area? This applet simulates meteorite impacts with the Earth's surface idealized as a sphere. The impacts are distributed evenly over the surface, and the frequency of those which occur within a given spherical cap is calculated.