1 . image of a black hole. Which black hole was the subject of this historic image?
- A. Sagittarius A
- B. Cygnus X-I
- C. Messier 87 (M87)
- D. V404 Cygni
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1 . image of a black hole. Which black hole was the subject of this historic image?
View Answer | Discuss in Forum | Workspace | Report |