All galaxies emit (give off) energy as waves of visible light and other kinds of electromagnetic radiation.
All galaxies emit (give off) energy as waves of visible light and other kinds of electromagnetic radiation.
所有的星系都以可见光及其他类型的电磁辐射的方式向外发射能量。
All galaxies emit (give off) energy as waves of visible light and other kinds of electromagnetic radiation.
所有的星系都以可见光及其他类型的电磁辐射的方式向外发射能量。