In 2005 there were fireworks on the 4th of July -- 83 million miles away, as the Deep Impact probe hit one of these
... 
we discovered there were a couple of parameters that were not set... [DOC] [TLE] Deep Impact Kicks Off Fourth of July With Deep Space Fireworks ... [PAR] After 172 days and 431 million kilometers (268 million miles) of deep space 
stalking, ... that resulted when NASA's Deep Impact probe collided with comet 
Tempel 1.