I remember the moon landing well myself and how we lauded the astronauts.
However, your ‘anachronism is” comment is just a tad out of place. An ‘astronaut wise man’ is itself an anachronism to the Nativity scene.
I think what you might have meant is that you believe that today’s generation is not perceptive enough to accept a Nativity done in the style popular a couple of generations ago. That isn’t anachronism though. And I don’t think you believe that today’s generation can ‘only’ accept a particular Nativity style rooted in its understanding, which would perhaps be a Mary who was Latinx, a Joseph who was Black, Asian and mixed race/gender fluid people dressed in contemporary clothing, etc.
So what could you mean? For the majority of time since the 13th century and St. Francis’ first Living Nativity, the basics were Mary and Joseph and the child, the wise men, the shepherds, animals, and the angels. . . The characters from Luke’s gospels and the early mystery plays in Europe. As time went on European and North American cultures developed cultural differences, to include the Spanish posadas in December, Protestant colonials not celebrating Christmas at ALL, etc.
In the 20th century there were ‘kitsch’ elements but for the Catholic Church in the major cities, the heartland, and Europe, the Nativity Scene remained classic for decades.
It seems so strange to me that pretty much from the 1960s on, as the Jesus seminar and the ‘experts’ in theology etc emphasized so so much ‘going back to the original worship and wanting everything to reflect ‘the first Christians’, at the same time Nativities in areas began to reflect instead an anachronistic ‘culture takeover’. Now are the times of the all Black nativities complete with various contemporary and cultural “African’ garb, ditto with Asian nativities; the “homeless’ nativities with Mary in jeans along with Joseph slouching along in a hoodie, the ‘commemorative’ Nativities which embrace some cultural icon like a “Simpsons’ nativity, a ‘Star Wars’ nativity, a ‘Tech’ nativity, dog and cat nativities, you name it.
But a nativity that would be recognizable to the majority of people before 1960? That is one rara avis here.