Скачать или смотреть DESI Just Found an Echo That Shouldn't Exist in Empty Space

New galaxy maps from DESI and the Euclid mission are chasing something that sounds impossible: a “note” from when the universe was only 380,000 years old. This video unpacks how real acoustic waves could travel through the early photon-baryon plasma, why that sound moved at a huge fraction of light speed, and how its surviving imprint shows up today as a subtle preference in galaxy spacing (about 500 million light-years apart). If you’ve heard Neil deGrasse Tyson describe the early universe as a hot, glowing fog, this is the concrete, measurable pattern that fog left behind. Along the way we connect baryon acoustic oscillations, the sound horizon, and what these maps can reveal about the expansion of the universe.