1 sentence explanation:
The Earth is a flat infinite disk accelerating upward at 9.8 m/s2, containing an ice wall to hold the water and a dark matter mass in order for spaceships to remain in orbit and NASA and the government are in on a conspiracy to make you believe the world is round, as in photoshopping pictures and the like, so that they can roll in the money from the NASA budget as well as other places.