When was Earth discovered?

Earth was eventually found to be the third planet orbiting the Sun in the solar system. Although its spherical nature was surmised by the Egyptians, Sumerians, and the Greeks, it was not until the time of Copernicus in the sixteenth century that the Earth was commonly understood to be a planet orbiting the Sun.

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First answer by ID1286709917. Last edit by Dfoofnik. Contributor trust: 1095 [recommend contributor]. Question popularity: 17 [recommend question].