NASA 搬运 D62
（卖力旋转的天王星大大）
How did Uranus get tilted so much that it spins on its side? This question has made many a scientist wonder. New research looking back at the planet’s early formation points to a young proto-planet of rock and ice colliding with Uranus, causing its extreme tilt. Instead of rotating like a top spinning nearly upright, as Earth does, the planet “rolls” on its side as it circles the Sun.
天王星是如何倾斜的，以至于它在侧面旋转？这个问题让很多科学家感到奇怪。回顾这个星球早期形成的新研究指向一个年轻的岩石和冰与天王星碰撞的原始行星，导致其极端倾斜。与地球一样，顶部旋转几乎直立旋转，而不是旋转，就像环绕着太阳一样，行星在其侧面“滚动”。
While it is the butt of many jokes, Uranus is actually a fascinating world to study. It is about four times wider than Earth orbiting our Sun at a distance of about 1.8 billion miles (2.9 billion kilometers). Uranus takes about 17 hours to rotate once (a Uranian day), and about 84 Earth years to complete an orbit of the Sun (a Uranian year). Uranus has 27 known moons, and they are named after characters from the works of William Shakespeare and Alexander Pope. With 13 known rings, we've seen that the inner rings are narrow and dark and the outer rings are brightly colored.
虽然它是一个烂笑话，但天王星实际上是一个迷人的世界。它比地球绕地球轨道宽约四倍宽，距离大约18亿英里（29亿公里）。天王星需要大约17个小时旋转一次（一个天王星日），大约84个地球年完成一个太阳轨道（一个天王星年）。天王星有27个已知的卫星，它们以威廉·莎士比亚和亚历山大·波普的作品中的人物命名。有13个已知的环，我们已经看到内环是窄而暗的，外环是明亮的颜色。
This false-color image was generated by Erich Karkoschka using data taken on August 8, 1998, with the @NASAHubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer.
这张假彩色图像是由Erich Karkoschka使用1998年8月8日采用@NASAHubble太空望远镜的近红外相机和多物体光谱仪拍摄的数据生成的。
Source: NASA/JPL/STScI
#nasa #space #solarsystem #uranus #hubble#picoftheday #colors #planet #planets #rings #spothubble#pictureoftheday
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