伯尔尼大学领导的国际团队于2026年8月26日在《Nature Astronomy》上发表研究成果，指出一次小行星撞击可能同时解释了火卫二（Deimos）南部的巨大凹陷及其表面平滑多尘的两大特征 1。该研究结合了计算机模拟与ESA Hera探测器于2025年3月飞掠火星时对火卫二的观测数据 1。
模拟结果显示，一颗直径约320米的小行星以45度角撞击火卫二，抛射物覆盖全球但未将其击碎，表明火卫二内部高度多孔且脆弱 1。此次撞击导致部分区域的沉积物厚度可能超过200米 1。这一发现为计划于2026年发射的日本JAXA的MMX探测任务提供了具体预测 1。
A single asteroid impact could simultaneously account for the massive southern depression and the smooth, dusty surface of Mars' moon Deimos, according to a study published on August 26, 2026, in the journal Nature Astronomy 1. An international team led by the University of Bern reached this conclusion by combining computer simulations with observational data from the European Space Agency's Hera spacecraft 1.
The simulations revealed that an asteroid approximately 320 meters in diameter struck Deimos at a 45-degree angle 1. This collision generated ejecta that blanketed the entire moon without shattering it, suggesting that Deimos possesses a highly porous and fragile interior 1. Consequently, the impact deposited material that may exceed 200 meters in thickness in certain areas 1. The research builds on observations made when the Hera spacecraft flew by Mars and observed Deimos in March 2025 1. Furthermore, these findings offer specific predictions for the Martian Moons eXploration (MMX) mission, which is scheduled for launch by the Japan Aerospace Exploration Agency (JAXA) in 2026 1.
评论
还没有评论，欢迎留下第一条。