Faint ‘whispers’ from the Moon may unveil the the first billion years of the Universe’s evolution, which has yet to be observed in detail. Very little is known about the first stars and galaxies that came into existence in this early period. One avenue to explore this epoch is to study the faint radio waves from neutral hydrogen atoms.
Following the Big Bang a gap of several hundred million years emerged that was filled with darkness– the cosmic dark ages, a time that’s not just absent light, but also devoid of data. Astronomers using the Mayall telescope at Kitt Peak National Observatory, have identified several overlapping bubbles of hydrogen gas ionized by the stars in early galaxies, a mere 680 million years after the Big Bang in these “cosmic dark ages” — when elementary particles, combined to form neutral hydrogen but no stars or galaxies existed yet to light up the Universe.