Isotropy and anisotropy: When a material is attacked by a liquid or vapor etchant, it is removed isotropically (uniformly in. all directions) or anisotropic etching (uniformity in vertical direction).
Some Questions Do Remain: 1  If the Earth was flat, we could travel to the place where the Earth and sky met. But we canât. 2  If the Earth was flat, we could reach the place where we could reach out and touch the Sun. But we canât. 3  If the Earth was flat, we could fall off the horizon. But we donâ 4 t. If the Earth was flat, it would simply fall.
The Flat Earth Society does admit that the moon, the sun and other planets are indeed spherical, but claim that the âEarth is not a planet,â and unlike other celestial bodies, is flat. So letâs ignore the moon for now and examine the other member of the eclipse trifecta: the sun.