然后天文学家友用哈勃和斯巴鲁望远镜来估算这些物体的距离，并寻找它们周围更高密度的星系。
The astronomers then used Hubble and the Subaru telescopes to estimate the distances to these objects, and look for higher densities of galaxies around them.
其中，速度表示星系后退的速度，H0为哈勃常数，也即宇宙膨胀速率的参数，而距离指的是星系与相比较星系之间的距离。
H0 is the Hubble constant, or parameter that indicates the rate at which the universe is expanding; and distance is the galaxy's distance from the one with which it's being compared.
另外，地面望远镜的分光镜观察结果进一步揭示出它们其中的一颗恒星实际上是一对紧密的双星组成的，它们距离太近以至于哈勃望远镜不能区分出来。
In addition, spectroscopic observations with ground-based telescopes further reveal that one of the stars is actually a tight binary that is too compact to be resolved even by Hubble.
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