Eyes in the Skies

Instead of sending probes to faraway planets, why not hitch them to comets?

Q. Instead of sending space probes to distant planets, is it possible to land a powerful camera or another instrument on a comet or asteroid — and have it send back information as it travels through space?A. “It is certainly possible to land a camera with other instruments on a comet or asteroid to take images of that object and its surroundings,” said Lindley N. Johnson, planetary defense officer at NASA headquarters in Washington. In fact, this has already been done.“However, space is a ver...