图示：宇宙早期的类星体
2022年2月22日 Illustration: An Early Quasar Illustration Credit & License: ESO, M. Kornmesser Explanation: What did the first quasars look like? The nearest quasars are now known to involve supermassive black holes in the centers of active galaxies. Gas and dust that falls toward a quasar glows brightly, sometimes outglowing the entire home galaxy. The qua...