adj. extragalactic
... 银河系天文学 galactic astronomy 银河系外的 anagalactic 银河系位（函数） galactic potential ...
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银河系外的有些星体其光度超过太阳。
当天文学家阿特·霍格偶然发现这个银河系外的非同一般的物体时，他首先问出来这个问题。
Astronomer Art Hoag first asked this question when he chanced upon this unusual extragalactic object.
现有的理论能很好的预测到遥远星系的干扰，但是这些理论同样预测了数以百计的银河系外的暗星系，而现在只发现了其中的少数星系。
Current theory correctly predicts the distribution of distant galaxies, she said. But it also predicts hundreds of dwarf galaxies around the Milky Way, and to date only a few dozen have been found.
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