Earth
OverviewNatural historyEtymologyPhysical characteristicsOrbit and rotationEarth–Moon systemHydrosphereAtmosphere
The oldest material found in the Solar System is dated to 4.5682+0.0002 −0.0004 Ga (billion years) ago. By 4.54±0.04 Ga the primordial Earth had formed. The bodies in the Solar System formed and evolved with the Sun. In theory, a solar nebula partitions a volume out of a molecular cloud by gravitational collapse, which begins to spin and flatten into a circumstellar disk, and then the planets


















