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A comment on Mysterious object is being dragged into the black hole at the Milky Way’s center. Parent comment
As the wikipedia article touches on, there's not an agreed global definition and it can be used differently in multiple contexts (hence why it's important to be specific).
This stack exchange answer gives a good list of terminology: https://physics.stackexchange.com/a/34675
And this article puts a far more technical description on terms: https://www.mprl-series.mpg.de/media/proceedings/3/9/Proc3ch...
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As the wikipedia article touches on, there's not an agreed global definition and it can be used differently in multiple contexts (hence why it's important to be specific).
This stack exchange answer gives a good list of terminology: https://physics.stackexchange.com/a/34675
And this article puts a far more technical description on terms: https://www.mprl-series.mpg.de/media/proceedings/3/9/Proc3ch...