`` It maneuvered for the planned observations of the comet and emerged unscathed . '' Swift Spring came within 100 miles of Earth ; that 's close for a comet impact . NASA protected its spacecraft orbiting the planet by letting them hide . The first of three NASA spacecraft reported to be in good condition .
Swift Spring came within 100 miles of Earth ; that 's close for a comet impact . NASA protected its spacecraft orbiting the planet by letting them hide . The first of three NASA spacecraft reported to be in good condition .