太阳系的行星：倾斜和旋转
(原标题: Planets of the Solar System: Tilts and Spins)
2022-09-11
浏览次数: 16
你最喜欢的行星是怎么旋转的？它是绕着垂直轴快速旋转，还是水平旋转，还是向后旋转？这段特色视频将美国宇航局拍摄的太阳系八颗行星的图像动画化，显示它们并排旋转，以便于进行比较。在这段延时视频中，地球上的一天——地球自转一周——只需要几秒钟。木星的自转速度最快，而金星的自转不仅最慢（你能看到吗？），而且是反向的。在太阳系形成的早期，内部的岩石行星经历了剧烈的改变自旋的碰撞。为什么行星旋转和倾斜仍然是一个研究主题，从现代计算机建模和最近对数百颗系外行星的发现和分析中获得了很多见解。系外行星是围绕其他恒星运行的行星。
查看原文解释
How does your favorite planet spin? Does it spin rapidly around a nearly vertical axis, or horizontally, or backwards? The featured video animates NASA images of all eight planets in our Solar System to show them spinning side-by-side for an easy comparison. In the time-lapse video, a day on Earth -- one Earth rotation -- takes just a few seconds. Jupiter rotates the fastest, while Venus spins not only the slowest (can you see it?), but backwards. The inner rocky planets across the top underwent dramatic spin-altering collisions during the early days of the Solar System. Why planets spin and tilt as they do remains a topic of research with much insight gained from modern computer modeling and the recent discovery and analysis of hundreds of exoplanets: planets orbiting other stars.