active galactic nucleus

短语

活动星系核

词形变化

active galactic nuclei 复数 active galactic nuclei

别名

AGN

释义与例句

n.
  1. 1.

    A compact region at the center of a galaxy that has a much higher than normal luminosity over at least some portion of the (measurable) electromagnetic spectrum.

    活动星系核

    天文