This swirling mass or " nebula" began to cool and, as it did, it condensed and separated into rings of particles.

这个巨大旋涡状物质或" " 开始冷却，而且，随着冷却开始聚，开变成粒子。

Nebula A cloud of gas and dust in interstellar space.

际空间中由气体和尘埃组成的状物。

Between M78 and Earth are long filaments of very cold and dark dust, blocking the light from the reflection nebula behind and looking like dark rivers running through it.

在 M78 和地球之间是由非常寒冷和黑暗的尘埃组成的长丝状物，阻挡了来自后面反射的光线，看起来就像流经其中的黑暗河流。