| 单词 | active galaxy |
| 释义 | > as lemmasactive galaxy active galaxy n. Astronomy a galaxy which emits an abnormally large amount of electromagnetic radiation, spec. one containing an active galactic nucleus. ΚΠ 1958 Progr. Theoret. Physics Suppl. No.6. 56 If there are 106 such active galaxies, as can be inferred from radio astronomy, we have..Density of cosmic rays from active galaxies ≃ 10−18 — 10−14 cm−3. 1990 J. Gribbin & M. Rees Cosmic Coincidences (1991) vi. 165 The central ‘prime movers’ in active galaxies are, theorists believe, spinning black holes, as massive as a hundred million Suns. 2003 UFO Mag. Sept. 79/3 Quasars are believed to be active galaxies containing a black hole at their centre. < as lemmas |
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