When the solar system first took up the task of building solid bodies—such as planets, moons and protoplanets—it basically had a choice between two ingredients: heat-forged chondrules, which were millimeter-sized bits of rock, and matrix, a fine-grained, cold dust loaded with water ice and organi...

Source: [Phys.org](https://phys.org/news/2026-09-solar-chose-ice-bodies.html)

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