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汉语拼音：xīng xì

由无数恒星和星际物质组成的天体系统，如银河系和河外星系。

1. 恒星系的简称。

   艾思奇 《辩证唯物主义与历史唯物主义》第二章三：“今天借助射电望远镜虽然使我们已经可以察觉距地球超过一百亿光年的星系，但是这也不是宇宙的边缘。”

• They turned their telescopes towards other nearby galaxies.

  他们把望远镜转向附近其他星系。

• Quasars are the highly energetic cores of distant galaxies.

  类星体是遥远星系的极为活跃的核心体.

• We still don't know how many galaxies there are in the universe.

  我们还不知道宇宙中有多少个星系.

• Are there other universes outside our own?

  在我们的银河系之外还有别的星系吗 ?

• Each galaxy contains myriads of stars.

  每一星系都有无数的恒星.

• Radio signals received from the galaxy's centre back up the black hole theory.

  从该星系中心收到的无线电信号证实了黑洞理论。

• Within our own galaxy there are probably tens of thousands of planetary systems.

  在我们自己的星系里可能有数以万计的行星系。

• Galactic surveys show that distant galaxies are not as evenly distributed in space as theory predicts.

  对银河系的研究表明，遥远星系在太空中的分布并不像理论所预言的那样均匀。

• To explain this, they hypothesise that galaxies must contain a great deal of missing matter which cannot be detected.

  为了解释这一点，他们假定各星系一定包含了大量无法探测到的不明物质。

• This law is known to hold true for galaxies at a distance of at least several billion light years.

  据知，这条定律同样适用于距离至少几十亿光年之远的星系。

• They reported that younger galaxies should be significantly bluer.

  据他们报道,较年轻的星系颜色应该显著地偏兰.

• Most galaxy associations are small and have a low density contrast.

  大多数星系协是小的,密度反衬低.

• Cosmologists are debating the possibility that turbulence causes galaxies to form.

  宇宙学家正在争论湍流导致星系诞生的可能性.

• Spiral galaxies are considered to be gravitationally bound configurations of stars.

  旋涡星系被认为是由恒星组成的引力束缚系统.

• There is a curious feature in the spectra of spiral galaxies.

  在旋涡星系的光谱中有一种奇妙的特征.