NASAのインスタグラム(nasa) - 6月24日 23時49分

Titan's Building Blocks Might Pre-date Saturn: A new study has found firm evidence that nitrogen in the atmosphere of Saturn's moon Titan originated in conditions similar to the cold birthplace of the most ancient comets from the Oort cloud.

This artist's concept depicts a fledgling solar system with a dusty pre-planetary disk circling the stellar embryo (doughnut-shaped cloud). Image credit: NASA/JPL-Caltech

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