Detection of an echo emitted by Sagittarius A* 200 years ago – Phys.org
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- Detection of an echo emitted by Sagittarius A* 200 years ago Phys.org
- The supermasive black hole Sagittarius A* woke up 200 years ago Interesting Engineering
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- Black Hole Emits Jets of X-rays 60,000 Times Hotter than Sun–the Brightest Quasar Ever Observed Good News Network
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Source: Science News