Prior to the Moon landing itself (Apollo 11), the most watched event in the history of television was the Christmas Eve broadcast from Apollo 8 in 1968. That crew was the first to actually leave the gravitational pull of Earth and visit the Moon, orbiting it several times but obviously not landing.

The video shows a very low-resolution but clearly desolate image of the lunar surface out of a tiny window on the command module, which put the three astronauts – Lovell, Borman, and Anders – in a reflective state of mind. Lovell, later of Apollo 13 fame, said: "The vast loneliness is awe-inspiring and it makes you realize just what you have back there on Earth."

Borman: "And from the crew of Apollo 8, we close with good night, good luck, a Merry Christmas, and God bless all of you – all of you on the good Earth."

Couldn't have said it better, Frank.