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哪颗行星离太阳最远? - Practical Tips

哪颗行星离太阳最远?

by Estelle

哪颗行星离太阳最远?在这里,许多人可能会说出冥王星。直到几年前,这都是正确的答案。然而,自2006年以来,这里发生了一些变化。

哪颗行星离太阳最远?它不再是冥王星了

我们的太阳系包括八颗行星,它们都围绕着太阳旋转。地球是继水星和金星之后离太阳最近的一个。另一方面,海王星则是最远的。

  • 海王星是我们太阳系中离太阳最远的行星。然而,情况并非总是如此。直到2006年8月24日,冥王星被认为是离太阳最远的行星。
  • 然而在2006年,冥王星被国际天文学联盟(IUA)剥夺了其 “行星 “的称号,因为这个词有了新的定义。此后,冥王星被认为是一颗矮行星,相当于一颗大的小行星。
  • 因此,海王星成为离太阳最远的行星已有数年。距离为45.0亿公里。作为比较,地球有1.5亿公里长。另一方面,冥王星距离太阳59.7亿公里。
  • 地球绕太阳运行需要365天,即一年,而海王星则需要165个地球年。

拥有14颗卫星的气体巨行星

海王星也被称为蓝色星球。然而,与最初的假设相反,这个星球不是由水构成的,而是由气体构成的。

  • 海王星的直径为49,528公里,是我们星球的60倍。
  • 尽管海王星很大,但它围绕自身旋转的速度比地球快。在16小时7分钟内,海王星已经在其轴上旋转,而地球需要24小时。
  • 到目前为止,我们知道海王星有14颗卫星在它附近。另一方面,地球只伴随着一颗卫星。

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