galactic

These speedy electrons interact with photons in the galactic halo, boosting some of them up to the gamma-ray energies observed in the bubbles..这些高速电子与银河晕的光子相互作用，将它们中的一些激发，使之成为泡泡中观测到的伽马射线。

Our Milky Way, if it could be viewed edge on, would display a good example of one of these galactic bulges: Imagine the profile of a stereotypical flying saucer, though with a wider and flatter disk..我们的银河，如果可以从边缘看向中心，就会呈现出一个这种星系凸起形态的好例子：想象一下从侧面看一个传统意义上的飞碟，尽管它有一个又宽又平的圆盘。

galactic center,银河系中心；银心