Fair enough of the beeb to mark the 40th anniversary of Bill Anders' Earthrise photographs. The most well-known one is one of two NASA images that I would argue belong in any "Best of the 20th Century" collection; Armstrong's snap of Aldrin being the other.
It was a tough Christmas for many, after a tough year. It was also my first. This moment made a lot of it worthwhile, so I urge you to make it a part of your Christmas iconography, if it isn't there already.