Astronomers have long studied supermassive black holes and smaller black holes that form when massive stars implode, but they have searched for intermediate-mass black holes for years.
원문출처 : https://www.cnn.com/2020/04/02/world/black-hole-missing-link-scn-trnd/index.html
원문출처 : https://www.cnn.com/2020/04/02/world/black-hole-missing-link-scn-trnd/index.html