nightside
/ˈnaɪtsaɪd/noun
1
- Astronomy the side of a planet or moon that is facing away from the sun and is therefore in darkness【天文】阴暗面（行星或卫星因背对太阳而处于黑暗中的那一面）。
2
- mass noun chiefly US the world at night; activities that take place during the night.〈主美〉夜间世界; 夜生活。