EPISODE · Nov 30, 2025 · 17 MIN
501. 火星液态水假说之雷达新证
from 知为谁 · host 知为谁
该来源是一篇科学报道，讨论了最近的发现，这些发现对火星南极冰盖下可能存在液态水的说法提出了质疑。此前，火星先进雷达对地下和电离层探测仪（MARSIS 雷达）发出的强烈反射曾被解释为潜在的地下水，这对火星的宜居性具有重大意义。为了核实这一发现，研究人员利用火星勘测轨道飞行器上的浅层雷达 (SHARAD)，通过一种新的“超大角度翻滚”机动来增强信号穿透力。然而，在同一高反射区域，新的 SHARAD 数据仅检测到微弱的回波，这与早期的观测结果相矛盾。这一结果表明，最初的明亮反射更有可能是由光滑的地面区域或其他干燥的高反射材料造成的，而非冰下的液态水。内容来源：https://phys.org/news/2025-11-liquid-mars.html
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501. 火星液态水假说之雷达新证
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