You need to understand settled science versus bleeding edge, and it's relationship to engineering, which by using science to make gadgets, proves that science every day. Early astronomers had several models, much like FE, some thought the earth center, some the sun, etc. Over time, this became settled science, and everyone agreed about the planets (although some disagree on what the criteria for a planets is, they all agree on the size and position of Pluto). Everyone agrees that Polaris is 93M miles away in the direction of the earth's axis off the north pole. This has been confirmed every time a navigator used a sextant to find their latitude and you can make an inclinometer and measure the angle off the horizon and use your cell phone gps and observe it reports your latitude as the same as inclinometer.
There are frontiers of science and astronomy that are not agreed, understood, and accepted by consensus - big bang, quantum, string theory, dark matter/energy, etc. Things that are far away in time or space, extremely small or extremely large, the things furthest from our everyday experience. Even then, we can get consensus, for example everyone agrees that water is molecules with one oxygen atom bonded covalently to two hydrogen atoms. I have seen them separated using electrolysis, and the idea of covalent bonding and the periodic chart is completely consistent. Science departments, industries, medicine, millions have learned about, used, and confirmed so many times and so many ways. Would it be a good use of your time to try to disprove atoms, molecules, and chemistry?
If you want to propose creative ideas about astronomy, big bang, quantum, dark energy/matter are not certain, you can join the speculation and efforts to nail it down. I'm sure there are web discussion about these things, some with real scientists. TFES style discussion is perfectly reasonable there. But the shape of the earth had to be known for successful long distance navigation. People have walked, driven, sailed, and flown all over, navigated, measured, confirmed, located, measured the distance between everywhere, and it matches RE distances, no FE map ever matched. GPS matches sextant, matches airline schedule time/speed distance, matches odometer, matches scaled distance on globe map, and does not match any FE map.