A supernova, possibly of type Ia, gravitationally lensed by a massive cluster, is predicted to appear in the future. It has the potential to allow an independent, high-precision measurement of the Hubble constant.

中文翻译：

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用超新星回到未来

预计未来会出现一颗超新星，可能是 Ia 型，被一个巨大的星团引力透镜化。它有可能允许对哈勃常数进行独立、高精度的测量。