[Kevmo]

Nope. Not wrong.

The law of gravity is basically things fall at 9.8m/s^2

More than two score relativistic theories of gravitation have been proposed. Some have no metric; others take the metric as fixed, not dynamic.

Gravitational Theories
https://www.google.com/search?q=how+many+theories+of+gravity+are+there&source=hp&ei=vYwNYfzENriGwbkPkNOaiA0&iflsig=AINFCbYAAAAAYQ2azcNIcFIYZoq980FReRKfEU_y_UM_&oq=how+many+theories+of+gravi&gs_lcp=Cgdnd3Mtd2l6EAEYADIFCAAQgAQyBQgAEIYDMgUIABCGAzoRCC4QgAQQsQMQxwEQowIQkwI6CwgAEIAEELEDEIMBOggIABCABBCxAzoOCC4QgAQQsQMQxwEQowI6CAgAELEDEIMBOhEILhCABBCxAxCDARDHARCjAjoICC4QsQMQgwE6CAguEIAEELEDOgcIABCABBAKOgcILhCABBAKOgkIABANEEYQ-wE6BAgAEA06CggAEIAEEEYQ-wE6BggAEBYQHlCVGViWbWCMfGgGcAB4AIABlAOIAakskgEKMC4yMS45LjAuMZgBAKABAbABAA&sclient=gws-wiz

[ShadowAce]

The law of gravity is basically things fall at 9.8m/s^2

Only on Earth. Not the Moon, or Jupiter.

And yes--you are wrong. Gravity is, scientifically speaking, a theory.