Astronomer Sir Patrick Moore said tonight he was "staggered" to be celebrating the 55th anniversary of The Sky At Night.
The 89-year-old said he hoped the stargazing series would continue "indefinitely", but that he wished the BBC would schedule it in an earlier time slot.
At a party hosted by BBC director general Mark Thompson, Sir Patrick said: "I'm absolutely staggered. I never thought when I began doing television shows that I'd be on for another year, let alone 55 years.
"I didn't know if I was going to be good enough or if the subject matter would hold up."