What primitive space rocks are considered time capsules containing unaltered building blocks from the solar nebula?

Answer

Chondrites

Direct physical evidence supporting the model of solar system formation is preserved within certain primitive meteorites, specifically those known as chondrites. These objects have remained chemically and structurally unaltered since the very beginning of the solar system's existence. By analyzing their isotopic composition and elemental ratios, scientists can trace chemical signatures back to the original interstellar medium from which the solar nebula formed. The analysis of chondrites confirms the theoretical processes of heating, initial condensation of solids, and subsequent accretion that occurred during the infancy of the nebula, providing a tangible link to the initial material budget.

What primitive space rocks are considered time capsules containing unaltered building blocks from the solar nebula?

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