There are adults out there who don't know that stars are just suns that are very far away.
There are adults out there who believe the sun is in the sky, within Earth's atmosphere, and pilots have to avoid it.
There are adults out there who believe the Earth is hollow, and if you go inside it, there is a sun in the centre and livable land populated by escaped Nazis from WW2.
It's all quite interesting and hilarious, and well worth a read. I find the craziest conspiracy theories very entertaining.