Black hole - Wikipedia
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What is a black hole?
![Column - Taking the First Picture of a Black Hole [3] - What is a black hole? - ALMA](https://alma-telescope.jp/assets/uploads/2017/05/2017-04-12_black_holes_infographic-v2-1800x1275.jpg "Column - Taking the First Picture of a Black Hole [3] - What is a black hole? - ALMA")
Column - Taking the First Picture of a Black Hole [3] - What is a black hole? - ALMA
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