II. The Sky is Falling

   A. Sky and Telescope magazine reports about one meteorite fall per year. How many similar meteorites fall over the entire Earth per year?

   B. During a vigorous Perseid meteor shower, what is the probability that one of humanity's artificial, Earth-orbiting satellites will be disabled?

   C. Oort Cloud comets continually rain into the Solar System. Sometimes they collide with a moon, say around Jupiter. How large must such a Jovian moon be to resist catastrophic disruption?

Students in this group: (I: Emily, Nick, Matt: Yes)