Two types of evidence supporting the hypothesis that Earth and the rest of the solar system formed from a condensing nebula include the presence of isotopic similarities in meteorites and planetary bodies, indicating a common origin, as well as the observation of protoplanetary disks around young stars, which are thought to be the precursors to planetary systems. Additionally, the distribution of angular momentum and the arrangement of planets in the solar system align with the expectations of nebular theory, suggesting a formation from a rotating cloud of gas and dust.
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