Studying the hydrogen fingerprint from just after the Big Bang could allow researchers to kill 'two birds with one stone!'
, a time when the earliest stars were just being born. There were thus few viable light sources to illuminate this ancient epoch for astronomers.
This has remained just a theoretical concept, however, due to the fact that light from this era has been traveling for around 13.4 billion years to reach us. Along the way, it has lost energy and had its wavelength stretched and its frequency lowered, moving it down the electromagnetic spectrum toward the red region and beyond to infrared. " process is.
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