Studying the composition of meteorites provides vital clues about what was happening in the early Solar System and how the planets in it formed. By far the greatest insights are provided by meteorites, particularly the fallen space rocks that can be collected immediately, before they have a chance to become weathered and contaminated by lying on Earth's surface. Over recent years, automated networks of sky-watching cameras have enormously increased the rate at which meteors can be detected while they're still fireballs falling through Earth's atmosphere. In some cases, the fireball's trajectory can be extrapolated forwards to predict roughly where the meteorite fragments will land, as well as backwards to determine the orbit of the original meteoroid. Recovered meteorites with a known point of origin are uniquely useful.
この記事は BBC Sky at Night Magazine の June 2022 版に掲載されています。
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この記事は BBC Sky at Night Magazine の June 2022 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
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