Ghostly Travellers The Sky at Night : Season 54 Episode 11
BBC Four 20m
Aired: November 8th, 2010 @ 10:00 PM EST on BBC Four
Comets are strange and exotic objects, the remnants from dead stars and the birth pangs of our solar system. Sir Patrick Moore discusses NASA's EPOXI mission, which hopes to rendezvous with comet Hartley 2.
