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bn:03870635n
Noun Concept
SYL
No term available
EN
In astronomical spectroscopy, the Gunn–Peterson trough is a feature of the spectra of quasars due to the presence of neutral hydrogen in the Intergalactic Medium. Wikipedia
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Sources
IS A
EN
singularity
EN
optical phenomenon
FACET OF
EN
electromagnetic spectrum
EN
quasar
EN
intergalactic medium
NAMED AFTER
James e. gunn

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