Ancient quasar imaged when the Universe lacked heavy metal

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2025-02-14 18:31:03 -

https://arstechnica.com/science/2012/12/ancient-quasar-imaged-when-the-universe-lacked-heavy-metal/

https://arstechnica.com/science/2012/12/ancient-quasar-imaged-when-the-universe-lacked-heavy-metal/

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Ancient quasar imaged when the Universe lacked heavy metal

Nothing heavier than helium in the neighborhood.

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