'We are rewriting the book on how galaxies formed and evolved in the immediate aftermath of the Big Bang.'
's 13.8-billion-year history. It's about 13.3 billion light-years away from us, meaning we're observing it as it looked when the universe was only a few hundred million years old — a meager 4% of its current age. This early era of the universe is known as the"Astronomers are still trying to figure out exactly what the firstlooked like, and how they were able to light up the universe to create what we see today.
"Ultra-faint galaxies such as JD1, on the other hand, are far more numerous, which is why we believe they are more representative of the galaxies that conducted the reionization process," said study lead author
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