首先，它太老了——甚至已经经过了红巨星阶段，红巨星阶段的恒星体积会迅速膨胀，并吞没近轨道的行星。

First, it's really old-past the Red Giant phase, when stars balloon in size and swallow up planets in close orbits.

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首先，它非常非常老了——它经历过红巨星阶段，这一阶段的恒星会急剧膨胀，吞噬在临近轨道运行的行星。

First, it's really old - past the Red Giant phase, when stars balloon in size and swallow up planets in close orbits.

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迄今发现的系外行星大部分是膨胀的、高速旋转的由气体构成的庞然大物，人们称之为“热木星”。“热木星”的轨道距它们的恒星非常近，因此可能不适合生命。

The majority of exoplanets discovered so far are bloated, fast-spinning gas giants, known as "hot Jupiters," that orbit extremely close to their stars and are thus probably unsuitable for life.

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