天文学家通过一种叫做引力透镜效应的物理现象来测算星系中暗物质的质量。
Astronomers measure how much dark matter lies in galaxies by a fluke of physics called gravitational lensing.
引力透镜效应(注2)的产生是因为引力会改变光路，正如爱因斯坦提出的那样。
Gravitational lensing occurs because gravity, as Einstein showed, bends light.
他们通过各种技术绘制了大量“暗物质地图”，包括星系簇的引力透镜效应。
They've created numerous "dark matter maps" using different techniques, including gravitational lensing of galaxy clusters.
这一项目的主要目标是，捕获重力微引力透镜效应，看不见的星体在背景星和地球之间穿过。
A major goal of the project is to capture gravitational microlensing events where an unseen body passes between a background star and Earth.
例如，当恒星发出的光经过一个星系附近，其路径会弯曲，改变恒星出现在天空中的位置——这就是所谓的引力透镜效应。
When light from a star passes near a galaxy, for example, its path bends, changing where the star appears in the sky-the so-called gravitational lensing effect.
作为例子，这个球面代表了恒星或其他质量附近的空间是怎样弯曲的-光通过这个扭曲空间所引起的弯曲称为引力透镜效应。
The sphere, for instance, represents how space is bent around a star or other mass - light passing through this warped space bends in an effect called gravitational lensing.
这个编号为MACS J 1149.5 + 2223的星团质量很大，它(通过引力透镜效应)把这个遥远的星系放大了。
Named MACS J1149.5 + 2223, the cluster is massive and its gravity magnifies the distant galaxy.
大多数介入其中的星系就像透镜一样发挥作用，所以“引力透镜”因此得名；同时经过的光线会发生各种各样离奇的效应。
The mass of the intervening galaxy acts like a lens, hence the term, and it can have all sorts of weird effects on the light.
大多数介入其中的星系就像透镜一样发挥作用，所以“引力透镜”因此得名；同时经过的光线会发生各种各样离奇的效应。
The mass of the intervening galaxy acts like a lens, hence the term, and it can have all sorts of weird effects on the light.
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