Asteroids, comets and moons are leftovers of planet formation. Studying them and their samples, including meteorites, can help us to learn how the Earth was made and acquired the ingredients for life, to obtain practical information for deflecting near-Earth objects (NEOs), and to access resources that would enable space habitats and voyages. Answers are hidden beneath their complex and evolving exteriors.

中文翻译：

---

小物体和卫星的内部。

小行星，彗星和卫星是行星形成的剩余物。研究它们及其样品，包括陨石，可以帮助我们了解地球是如何构成的，并获取了生命的成分，获得了偏转近地物体（NEOs）的实用信息，并获得了可以使空间栖息地和航程。答案隐藏在复杂而不断发展的外部环境之下。