interstellar medium

基本解释

A star is formed when a cloud of gas collapses from the interstellar medium toward high density.
一个气体云自星际物质中坍缩，密度达到很高时，即形成了一个恒星。
This time-lag depends on the distance the signal has traveled through the interstellar medium: the longer the distance, the greater the time lag.
这个时间差依赖于信号在星际介质中传播的路程：路程越长，时间差越大。
I was in high school when Explorer 10 went up, and in my lifetime we have gone from being just above the atmosphere to reaching for the interstellar medium.
“探索者”10号人造卫星升空的时候，我还在上中学；在我的一生当中，我们研制的飞行器飞行能力从刚刚高于大气层的位置一直到达星际空间。
huzhangao.blog.163.com

He notes that should produce radiation capable of ionizing the helium contained in the interstellar medium.
FORBES: Move up http://i.forbesimg.com t Move down
To get a read on the true nature of the pristine Interstellar Medium (ISM) — the space between the stars, we need a dedicated Interstellar Precursor Mission.
FORBES: Jump-Starting A Mission To Interstellar Space
He chose this because the supernova that created it blew a giant bubble, known as the Vela nebula, out of the surrounding interstellar medium, and that bubble is big enough to stand in for the infinite sheet of gas.
ECONOMIST: Pulsars: In a wink

the matter occurring between the stars of our Galaxy, largely in the spiral arms, and consisting mainly of huge clouds of ionized, neutral, or molecular hydrogen ( abbr: ISM)