Its parent star is a red dwarf--a far smaller and fainter object than the sun.

其母体恒星就像是一个红色的小矮人——比起太阳来实在是又小又模糊。

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Red giants exist for only a short time—perhaps just a billion years compared with the ten billion the same star may already have spent burning hydrogen like our own sun.

红巨星只在短期内存在——可能只有十亿年，相比起来，像太阳这样的恒星将在百亿年中持续燃烧它们的氢。

youdao

However, since its parent star is a red dwarf-a far smaller and fainter object than the sun-that orbit is, in fact, much smaller that the Earth's around the sun.

但是因为其母体恒星就像是一个红色的小矮人——比起地球来实在是又小又模糊，因此它的运行轨道与地球相比也就小了很多。

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