The Sky at Night
Ghostly Travellers
Not Rated
S54 • E11 Nov 8, 2010Comets are strange and exotic objects, the remnants from dead stars and the birth pangs of our solar system. Only a handful of these ghostly, celestial objects have been seen at close quarters. Sir Patrick Moore discusses NASA's EPOXI mission, which hopes to rendezvous with comet Hartley 2.
