JWST's launch transformed our understanding of the cosmos, unveiling numerous early galaxies that left scientists grappling with their unexpected abundance and properties.
JADES-GS-z13-1-LA, the fifth most distant galaxy, surprises astronomers with its bright Lyman-α emission line, raising questions about the light-blocking atoms that should obscure its signals.
The existence of such a bright emission line from a galaxy over 200 million years earlier than expected challenges our understanding of the ionization of the early Universe.
If the Lyman-α line's brightness is due to thermal or kinetic effects, it could rewrite astronomical theories about light propagation in the primordial Universe.
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