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The oldest known black hole formed more than 13.3 billion years ago
Scientists find oldest-known black hole in the universe: 'This is about as far back as you can practically go'
This black hole lies only 1,600 lightyears away, making it the closest known black hole to Earth
The heaviest known black hole in a binary star system in the Milky Way galaxy - EurekAlert
Astronomers Discover the Oldest Known Black Hole, Breaking a Record Set Last Year
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