The concept of a Round Earth refers to the shape of our planet, which is an oblate spheroid. This means it is mostly spherical but slightly flattened at the poles and bulging at the equator. The idea has been supported by various scientific observations, including satellite images and the way ships disappear over the horizon. The Round Earth model explains many natural phenomena, such as the changing seasons and the way gravity pulls objects toward the center of the planet. This shape allows for a consistent experience of day and night as the Earth rotates on its axis, creating a cycle of light and darkness.