Cold gas would emit radio waves, for example.

例如，冷气体会发射无线电波。

Some scientists believe that dark matter consists of regular space objects, such as dark galaxies or cold gases.

一些科学家认为，暗物质是由普通的太空物体组成的，比如暗星系或冷气体。

This cold gas giant orbits almost 90 degrees on its side.

这颗寒冷的气态巨行星在其一侧几乎呈 90 度角运行。

But De said his examinations suggested the outburst was surrounded by cold gas, meaning it could not be a binary system.

但德说，他的检查表明，这次爆发被冷气体包围，这意味着，它不可能是一个双星系统。

They listed every single thing they could think of that dark matter could possibly be: cold gas, dust, dead stars, rogue planets, everything.

冷气体、尘埃、死亡的恒星、游荡的行星，一切事物。