quasar GMAT

1.Quasars are the highly energetic cores of distant galaxies.

类星是遥远星系的极为活跃的核心。

2.Spacewalking astronauts installed an 88-million-dollar spectrograph designed to detect faint light from faraway quasar .

太空漫步宇航员安装8．8千万美元的谱仪，用于探测来自遥远类星的微。