舱内粒子的平均能量很高，主要成分是银河宇宙辐射。
The estimated average energy of the particles in the cabin is on the level of Galactic cosmic radiation.
从威尔金森微波各向异性探测器(WMAP)得来的数据显示出，细微温度变化是在宇宙微波背景辐射移动通过银河星系团气体时产生的。
Data from the Wilkinson microwave Anisotropy Probe (WMAP) can show the minute temperature changes created as the cosmic microwave background radiation moves through gases in galaxy clusters.
描绘宇宙微波背景辐射是很困难的，因为银河系本身在这些波长发射很多，使得背景辐射难以分离出来。
Mapping the cosmic microwave background is hard because the Milky Way itself shines quite brightly at these wavelengths, making the background hard to discern.
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