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。

youdao

youdao

youdao

The module called Kibo or "Hope" in Japanese will allow astronauts to conduct experiments that involve exposing materials to the vacuum of space.

VOA: standard.2009.07.16

But in the vacuum of space the tiny amount of air trapped between them would inflate to create a semi-rigid structure.

BBC: Sticking solar power station where the Sun shines

The Vulcain engine as you know is ignited on the ground, but on Liberty it would need to ignite in the vacuum of space.

BBC: New rocket could lift astronauts

Turner says it's hard enough for scientists to understand how the supposedly empty vacuum of space can be suffused with some form of cosmic energy.

NPR: New Clue to Universe's Darkest Mystery