The astronomers found an "X-ray mass" only a tenth of the mass found using the gravitational lens method.

天文学家发现“X射线估算的质量”仅有“引力透镜”方法估算的质量的十分之一。

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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.

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。

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General relativity predicts that the wavelength of this light will be shifted by a small amount due to the galaxies' mass, in an effect called gravitational redshift.

广义相对论预言这种光的波长会因这些星系的质量而有少量的偏移，这种效应称为引力红移。

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Other is gravitational mass, which is the measure of how much you're attracted to the Earth.

另一个是引力质量,它可以用来衡量地球对物体引力的大小

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One way is to try and falsify the equivalence principle, to show that the two phenomena of gravitational and inertial mass are not really identical.

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As its mass increases, so does its gravitational pull.

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Another theory suggests that material surrounding a young star can undergo gravitational collapse under its own mass.

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