The flat earth theory is a belief that the earth is not a spherical planet, but a flat disc surrounded by a wall of ice. This theory has been rejected by modern science, which has provided ample evidence for the earth’s shape, such as satellite images, gravity measurements, and astronomical observations. However, some people still hold on to this theory, either as a form of skepticism, conspiracy, or religion.

Some of the common arguments that flat earthers use are:

The horizon always appears flat and level, regardless of the observer’s altitude.
The sun and the moon are much smaller and closer than mainstream science claims, and they move in circles above the flat earth.
Gravity is not a real force, but an illusion caused by the upward acceleration of the flat earth or the density of objects.
NASA and other space agencies are lying about the shape of the earth and the existence of outer space, and they use CGI and other tricks to create fake images and videos.