this post was submitted on 09 Jul 2023

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Space

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X-Ray echo suggests our galaxy was "active" (quasar-like) just 200 years ago - Nature (www.nature.com)

submitted 2 years ago by [email protected] to c/space

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cross-posted from: https://lemmy.sdf.org/post/659261

Well, from the perspective of Earth. Obviously there's a big delay on the way here, which is kind of the entire idea of the technique used.

Plus, without reading the paper I'm not sure what "briefly" means. Even if it was a short spurt this is crazy, though.

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