This unexpected result indicates that the falloff in luminous mass with distance from the center is balanced by an increase in nonluminous mass.
这个意外的结果表明随着远离核心，发光物质逐渐减少，不发光物质逐步增加，最终两者达到了平衡。
By comparing that calculated mass to the mass that comes from only luminous objects (the galaxies), they can determine how much dark matter is in the cluster.
然后通过和那些只计算发光天体(星系)的质量进行对比，他们就能够得出星系簇中有多少暗物质的存在了。
Being brighter than one million Suns, Eta Carinae (the brightest star in this image) is the most luminous star known in the Galaxy, and has most likely a mass over 100 times that of the Sun.
作为其光亮超过太阳100万倍的船底座伊塔星，被称为为银河系中最明亮的恒星，其规模超过太阳的100万倍。
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