We review the evidence for buried ice in the asteroid belt; specifically the questions around the so-called Main Belt Comets (MBCs). We summarise the evidence for water throughout the Solar System, and describe the various methods for detecting it, including remote sensing from ultraviolet to radio wavelengths. We review progress in the first decade of study of MBCs, including observations, modelling of ice survival, and discussion on their origins. We then look at which methods will likely be most effective for further progress, including the key challenge of direct detection of (escaping) water in these bodies.

中文翻译：

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太阳系中的主带彗星和冰

我们回顾了小行星带中埋有冰的证据；特别是围绕所谓的主带彗星（MBC）的问题。我们总结了整个太阳系中存在水的证据，并描述了检测水的各种方法，包括从紫外线到无线电波长的遥感。我们回顾了 MBC 研究的第一个十年的进展，包括观察、冰生存模型以及对其起源的讨论。然后，我们研究哪些方法可能对进一步取得进展最有效，包括直接检测这些体内（逸出）水的关键挑战。