But, . . .
n“If the
asteroid comes too close, it might break up or conceivably even slam into Earth.”
n“Another
possible side effect . . . would be to increase the planet's rotation. The encounters would have to be planned so that while some would cause the Earth to spin faster, others would slow it down back to normal rotation speed.”
n“It's also possible that the moon would be thrown from its orbit around the Earth during these
fly-bys.”