Mock him for being incurious, stupid and failing google-fu.

Or show him some of these links, your call.

rmg.co.uk/…/moon-landing-conspiracy-theories-debu…

starwalk.space/en/news/was-the-moon-landing-fake

askanexpert.asu.edu/earthspace/…/moon-landing

For the Artemis vs Apollo stuffs:

spaceinformer.com/artemis-vs-apollo-comparison/

apollo11space.com/apollo-vs-artemis-how-technolog…

And just to see how stupid he is, maybe ask if the earth is flat. If they say yes… just have him go watch this entire channel…

The reason I’m calling him stupid is because he’s either never actually searched or done any kind of research beyond conspiracy theory memes, or has immediately discounted the vast majority of people patiently explaining why he’s wrong.