Determining where a distant object lies in space takes a bit of work, because the universe lacks clear distance markers.

由于宇宙中缺少明显的距离标识，在空间中确定一个遥远的物体的位置需要大量的工作。

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Gravitational lensing works like this: When a large nearby object like a galaxy blocks a distant object, such as another galaxy, the light can detour around the blockage.

引力透镜的工作原理如下：较近的大型物体如星系挡住一个远处的物体，如另一个星系时，光可以从阻挡物的旁边绕过来。

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Astronomers have seen "Einstein rings", formed when light from a distant galaxy is bent by the presence of a nearer massive object, usually another galaxy, that lies directly in its path to Earth.

天文学家们已经观测到了数个“爱因斯坦环”。他们来自遥远的星系，被近处的一个大质量物体(通常是另外一个星系)所弯曲，才来到地球。

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The object moved slowly in the sky like a distant planet.

VOA: special.2010.07.11

The near object's gravity bends the light rays from the more distant object and magnifies them like a lens.

BBC: Artist's concept of a distant world (BBC)

Make work legal, while making citizenship a distant object for those who want it.

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Obama's targeted tax cuts will make the worthy goal of tax simplification an even more distant object.

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