Hale Bopp is one of the most widely observed comets of the 20th century. Its discovery in 1995 resulted in huge advances in science. Show more
Discover 11,128,835 listings and 280,259 playable programmes from the BBC
Hale Bopp is one of the most widely observed comets of the 20th century. Its discovery in 1995 resulted in huge advances in science. Show more
The BBC's international radio station
