It has taken 13 billion years for the light from the powerful jets of a distant object to reach us.
원문출처 : https://www.cnn.com/2021/03/08/world/most-distant-cosmic-jet-quasar-scn/index.html
원문출처 : https://www.cnn.com/2021/03/08/world/most-distant-cosmic-jet-quasar-scn/index.html