The "Globe Earth Theory" posits that the Earth is a spherical object, shaped like a globe. This theory is supported by various scientific observations, such as the way ships disappear over the horizon and the way the Earth casts a round shadow on the Moon during a lunar eclipse. Additionally, images from space, taken by satellites and astronauts, provide visual evidence of the Earth's round shape. The theory is also reinforced by the principles of gravity, which explain how mass attracts other mass, resulting in a spherical form for large celestial bodies like the Earth.