Whether a planet can support life depends on the size and brightness of its star, thatis its 'sun'. Imagine a star up to twenty times larger, brighter, brighter and hotterthan our own sun. A planet would have to be a very long way from it to be capable ofsupporting life.

　　7.Whether a planet can support life depends on the size and brightness of its star,that is its 'sun'.

　　一颗行星是否能够维持生命取决于它的恒星—即它的“太阳”—的大小和亮度。

　　语言点:句子结构分析:whether a planet can support是主语从句。

　　8.Imagine a star up to twenty times larger, brighter, brighter and hotter than our ownsun.

　　设想一下，一颗恒星比我们的太阳还要大，还要亮，还要热20倍。

　　9.A planet would have to be a very long way from it to be capable of supporting life.

　　那么一颗行星为了维持生命就要离开的它的恒星非常远。

　　语言点:句子结构分析:would have to be是虚拟语气结构。