Why Early Galaxies Shine So Bright: The Secret of Transparent Dust express
The JWST telescope has spotted a multitude of bright galaxies in the young universe. Their ultraviolet light was barely absorbed by cosmic dust — defying previous expectations. The secret is that in the cosmic dawn, dust was born in supernova explosions and was as transparent as a freshly cleaned window pane.
As galaxies age, dust grains clump together and grow, turning that clear screen into heavy curtains that smother light. That’s why ancient galaxies blaze so intensely — their light traveled freely through unclouded dust. Over time, the same dust becomes opaque, perfectly explaining observations without needing exotic theories.
Dust grains from supernovae are hundreds of times smaller than UV waves: light slips through them like water through a coarse sieve, meeting no resistance.