瑞士苏黎世联邦理工学院的研究人员通过分析来自陨石的十种同位素系统，得出了一项令人震惊的结论：地球的构成物质几乎完全来自内太阳系，来自木星外部的物质占地球总质量不足2%，甚至可能为零 1。这一发现于2026年9月16日发表在《自然·天文学》杂志上，直接挑战了长期以来关于地球水等挥发性物质必须来自外太阳系的传统观点 1。
研究主要作者之一Dan Bower表示："我们真的感到震惊，地球完全由来自内太阳系的物质组成，不同于现有陨石的任何组合" 1。另一位主要研究者Paolo Sossi指出："我们的计算清楚地表明：地球的构成物质来自单一物质库" 1。此项研究的关键创新在于采用了比传统研究更为全面的方法——分析十种不同的同位素系统，而以往研究通常仅关注两种同位素系统 1。研究发现地球的成分类似于火星和灶神星 1。
这一发现虽然证实了地球在相对稳定的环境中形成，但同时提出了新的科学谜题：在内太阳系炎热的环境中，如何存在足够的水来供应地球 1。
Researchers at ETH Zurich have fundamentally challenged conventional understanding of how Earth formed by demonstrating that nearly all of the planet's material originated from the inner solar system, with less than 2% or possibly zero contribution from beyond Jupiter's orbit 1. By analyzing ten different isotopic systems from meteorite samples—a substantially broader approach than the two-system focus of traditional research—the team determined that Earth's constituent matter came from a single material reservoir 1.
The findings present a puzzle for planetary scientists, as they contradict the prevailing theory that volatile substances like water must have been delivered to Earth from the outer solar system 1. "We are truly astonished. Earth is composed entirely of material from the inner solar system, unlike any combination of existing meteorites," said Dan Bower, a member of the research team 1. Paolo Sossi, another researcher involved in the study, emphasized that "our calculations clearly show that Earth's constituent material comes from a single material source" 1. Earth's composition appears similar to that of Mars and the asteroid Vesta, according to the analysis 1.
The study raises a compelling new question: how could sufficient water exist in the hot inner solar system environment to supply Earth's oceans if the planet formed exclusively from local materials 1? The research was published in Nature Astronomy on September 16, 2026, in volume 10, issue 7, page 972 1.
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