Until recently most astronomers believed that the space between the galaxies in our universe was a near-perfect vacuum.

直到最近，大多数天文学家都认为我们宇宙中星系之间的空间是近乎完美的真空。

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Is there any other form of life in the galaxies?

星系里有其他形式匠生命吗？

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The tides disrupt the galaxies as they repeatedly swing close to one another.

当它们多次互相摇晃靠近时，引潮力扰乱了星系。

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They appear blue. Observations of forty-six galaxies showed Hubble that the galaxies were traveling away from Earth.

VOA: special.2009.04.29

The observations also showed that the speed was linked directly to the galaxies' distance from Earth.

VOA: special.2009.04.29

The idea is that the matter we see does not have enough gravitational pull to keep galaxies together.

VOA: special.2009.07.21

Estimates such as this may help finally unravel the interplay between black holes and the galaxies that host them.

BBC: Supermassive black hole weighed using new scale

She couldn't find it, you know, match it up in the galaxies.

NPR: What Makes Our Solar System Special?

That means they will have expanded with it, producing peaks and troughs in the density of the galaxies that formed from primordial matter.

ECONOMIST: Astronomy