Gravity isn’t real—only density and buoyancy exist.
Density and buoyancy require a force that defines “down.” In a vacuum chamber a bowling ball and feather fall together because air resistance is removed; what’s left is 9.8 m/s² of gravitational acceleration pulling both toward Earth’s centre—exactly what a spherical mass predicts.
Why is this claim made?
The claim is based on everyday observations of objects sinking or floating in fluids, which can be explained by density and buoyancy. Flat-Earth proponents extend this to reject gravity as a force.
Why the claim doesn’t work
Density and buoyancy describe how objects move in a fluid, but they require a force to define “down.” In a vacuum chamber, both a bowling ball and feather fall at the same rate, confirming gravitational acceleration.
Evidence against the claim
- Vacuum chamber experiments show all objects fall at the same rate without air resistance.
- Gravity is required to explain tides, planetary orbits, and weight.
- Newton’s law and Einstein’s theory of gravity predict these effects precisely.
Summary
Density and buoyancy require gravity to function. Experiments and physics both confirm gravity as a real force.
Links to additional resources