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宇宙中的行星:概述 - Practical Tips

宇宙中的行星:概述

by Mike

宇宙中到底有多少颗行星,这个问题困扰着许多科学家、研究人员和太空爱好者。但是并没有确切的答案

宇宙中的行星:一个未知数

行星是宇宙中的天体之一。一些(业余)研究人员已经问过自己到底有多少颗。答案是未知的或非常宽泛的。

  • 事实上,宇宙中只有一小部分(个位数范围)被探索过。在这个已知比例中,已经探测到大约 5,000 颗行星。
  •  据估计,仅银河系就可能包含约1600亿颗行星。因此,要给整个宇宙一个数字似乎几乎是不可能的。在这种情况下,人类可能不得不满足于一个非常笼统的答案:非常非常多。
  •  至少我们对太阳系有了更多的了解。八大行星围绕太阳运转。除地球外,还有水星、金星、火星、木星、土星、天王星和海王星。
  • 冥王星,以前也被称为行星,现在被 “降级 “为矮行星。
  • 除了行星和矮行星,其他天体如卫星、小行星和彗星也在太阳系中移动。
  • 除了我们的太阳系,还有数十亿个其他太阳系,这些太阳系又包括数量未知的行星。

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