加州大学河滨分校的研究团队通过计算机模拟发现，金星可能曾拥有一颗月球，但最终因行星自转极其缓慢而被吞没1。与地球月球每年以约四厘米的速度远离地球不同1，金星月球会因重力作用逐渐螺旋式坠入金星表面1。由于金星自转一周需要243个地球日，远慢于地球的24小时1，这使得潜在的金星月球无法像地球月球那样稳定地保持轨道。
研究团队对质量从月球质量一半到十倍的各种假设月球进行了模拟测试，结果高度一致：所有情况下月球最终都会坠入金星1。值得注意的是，质量越大的月球坠落速度越快1。研究人员斯蒂芬·凯恩表示："我的研究表明，如果这些行星自转不够快，月球会坠入表面，这将改变这些行星的历史进程。"1
金星表面约80%的面积年代相同，暗示约10亿年前发生过大规模地质变动事件1，这可能与月球撞击事件相关。该研究已发表在《天体物理学杂志》2026年第1009卷第1期1。
Researchers at the University of California, Riverside have proposed that Venus once possessed a natural satellite that was ultimately consumed by the planet itself.1 Unlike Earth's moon, which recedes from our planet at approximately four centimeters per year, a Venusian moon would have followed a drastically different fate due to the dramatic difference in rotational speeds between the two worlds.1
The critical factor driving this divergence is Venus's extraordinarily slow rotation: the planet requires 243 Earth days to complete a single rotation, compared to Earth's 24-hour period.1 Computer simulations tested hypothetical moons with masses ranging from half to ten times that of Earth's moon, and the results were consistent across all scenarios—every simulated moon eventually spiraled into Venus's surface.1 Notably, larger moons descended faster than their smaller counterparts.1 Stephen Kane, one of the researchers, stated: "My research shows that if these planets don't rotate fast enough, moons will fall into the surface, which would change the history of these planets."1
The hypothesis finds potential support in observations of Venus's geology. Approximately 80 percent of Venus's surface displays similar age characteristics, suggesting that a major geological upheaval occurred roughly one billion years ago.1 The research has been published in The Astrophysical Journal, Volume 1009, Issue 1, in 2026.1
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