Millions of elusive black holes hide in plain sight across the Milky Way galaxy, only giving away their presence occasionally through bursts of X-ray light when they feed on stars.
원문출처 : https://www.cnn.com/2022/05/06/world/black-hole-echo-sounds-scn/index.html
원문출처 : https://www.cnn.com/2022/05/06/world/black-hole-echo-sounds-scn/index.html