Such a definition would greatly expand the list of planets in the solar system.

这一定义将会大大地加长太阳系行星的名单。

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New simulations of extrasolar planetary systems may mean the definition of "habitable" planets needs to be completely overhauled.

针对系外行星系统的最新模拟可能意味着“可居住”行星的定义需彻底颠覆。

youdao

Cycles, by definition, are repetitive in nature, so it is the return of one of five planets that I describe in each of the chapters.

根据定义，周期在本质上是重复的，所以我在每个章节里分别描述五个星体中一个的回归。

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Mr. SYKES: Well, we have the means of opening up the discussion and getting all the different viewpoints, and so we're looking at setting up such a discussion initially online, in which people would talk about what are the characteristics of things that we call planets or planetary bodies, regardless of whether everybody agrees a definition of the outset.

NPR: Astronomers Prepare to Fight Pluto Demotion