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天文学家使用哈勃望远镜获得了天王星最精确自转测量

2025-04-12 20:08 by 千与千寻

天文学家运用哈勃太空望远镜,透过观测天王星极光的旋转运动测定其内部自转速率,精确度比过去的推算提升了一千倍。这项突破性的成果,为未来行星科学研究奠定了关键的新基准。行星的自转周期是理解其内部结构与磁场的重要基础,但对于像天王星这样遥远的天体而言,准确掌握其自转速率极具挑战性。为了解决这项难题,天文学家发展出一项崭新技术:透过观测天王星极光的旋转运动来推算其自转速率。这些极光是高能粒子流入天王星磁极区域,与上层大气互动后所产生的发光现象。研究团队分析了哈勃望远镜自 2011 年以来超过十年的紫外线极光观测资料,建立出磁场模型,并成功比对极光与磁极位置的时间变化,从而推算出天王星完整自转一圈的时间为 17 小时 14 分 52 秒,比 1986 年 NASA 航海家二号飞掠时的估计值多出 28 秒,精确度也提升了一千倍。

Nature Astronomy:A new rotation period and longitude system for Uranus
天文館:哈伯測量天王星自轉速率,精確度提升千倍

#科学



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天文学家使用哈勃望远镜获得了天王星最精确自转测量

2025-04-12 20:08 by 千与千寻

天文学家运用哈勃太空望远镜,透过观测天王星极光的旋转运动测定其内部自转速率,精确度比过去的推算提升了一千倍。这项突破性的成果,为未来行星科学研究奠定了关键的新基准。行星的自转周期是理解其内部结构与磁场的重要基础,但对于像天王星这样遥远的天体而言,准确掌握其自转速率极具挑战性。为了解决这项难题,天文学家发展出一项崭新技术:透过观测天王星极光的旋转运动来推算其自转速率。这些极光是高能粒子流入天王星磁极区域,与上层大气互动后所产生的发光现象。研究团队分析了哈勃望远镜自 2011 年以来超过十年的紫外线极光观测资料,建立出磁场模型,并成功比对极光与磁极位置的时间变化,从而推算出天王星完整自转一圈的时间为 17 小时 14 分 52 秒,比 1986 年 NASA 航海家二号飞掠时的估计值多出 28 秒,精确度也提升了一千倍。

Nature Astronomy:A new rotation period and longitude system for Uranus
天文館:哈伯測量天王星自轉速率,精確度提升千倍

#科学

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