A new study published in The Astrophysical Journal has discovered evidence of the earliest galaxies in the universe. This discovery provides new insight into the timeline of galaxy formation, which is thought to have begun shortly after the Big Bang. The research team, led by Dr. Grant Tremblay of the Harvard-Smithsonian Center for Astrophysics, used the Chandra X-ray Observatory to observe a distant cluster of galaxies known as Abell 2744. By studying the X-ray emission from the galaxies in this cluster, the team was able to identify the oldest galaxies in the universe. These galaxies are approximately 13 billion years old, and thus provide a glimpse into the earliest stages of galaxy formation. The team’s findings suggest that galaxies began to form just one billion years after the Big Bang, which is much earlier than previously thought. This research provides a valuable opportunity to better understand the evolution of galaxies over time.

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source: Phys.org