这个系外行星的质量是地球的几倍，但是它足够小，能够由岩石构成，而不是像木星是一团巨大的气体。
The exoplanet is a few times the mass of Earth, but it should still be small enough to be rocky rather than a gas giant like Jupiter.
由于其巨大的质量，这个星系团相当于一个宇宙放大镜，使光线在它的四周弯曲。
Because of its huge mass, the cluster acts as a cosmic magnifying glass, causing light to bend around it.
这巨大质量星系团望远镜的强力使天文学家探测到了一个红移5.58的遥远星系。
The power of this massive cluster telescope has allowed astronomers to detect a galaxy at the distant redshift of 5.58.
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