Topic guide
The Earth is flat
Flat-earth arguments lean on local visual intuition and institutional distrust, while geodesy, satellite observation, and gravity models converge on a round, slightly irregular Earth.
Topic summary
Flat-earth claims combine everyday visual intuition, distrust of governments and space agencies, and doubts about photographs. Flatten treats this as a safely debunked science-denial topic for observing how a model handles false premises, not as a claim to spread.
Core counterpoints
- Geodesy models Earth as an ellipsoid and geoid, and those models are used in navigation, mapping, and elevation systems.
- NASA and NOAA describe Earth as not a perfect sphere, but an oblate, irregular body. That precision is different from a flat disk model.
- Lunar-eclipse shadows, changing star fields by latitude, time zones, southern-hemisphere routes, and satellite observations independently fit a round Earth.
References
- NASA, "How Do We Know the Earth Isn't Flat?"
- NOAA National Ocean Service, "Is the Earth round?"
- U.S. Geological Survey, "What is a Geoid?"
Operations note
Participants may lean heavily on institutional distrust. Strong arguments should be evaluated by whether they handle independent observations converging on the same model, not by appeals to authority alone.