![]() The galaxy ceers-2112 is observed in a region of the sky located between the constellations Ursa Major and Boyero, the dotted line that looks like a human figure and contains the star Arthur, one of the brightest in the sky. It is the most distant Milky Way-like galaxy known to science. Pérez González compares the discovery to a 100-year-old person, who has never seen himself in the mirror, and receives a letter with a self-portrait that an unknown twin sister sent him when he was 15 years old. ![]() "It's like seeing our galaxy back in time," says Costantin, a 33-year-old Italian researcher. What the ultrasensitive James Webb Space Telescope had captured was the faint light sent then, in the infancy of the cosmos. The study by Costantin and his colleagues reveals that galaxies similar to the Milky Way existed 11.7 billion years ago, when the universe was barely 15% of its current age. The universe is about 13.8 billion years old. The discovery was published on Wednesday in the prestigious science journal Nature. He had just discovered the galaxy ceers-2112, a kind of "twin sister" to the Milky Way - home to planet Earth - on the other side of space. ![]() "I started looking at galaxies and classifying them, when one caught my attention," he remembers. In his inbox were new images taken by the revolutionary James Webb Space Telescope, launched on Christmas 2021. "I have a bad habit of looking at my email for an hour before going to sleep, even on vacation," he explains. On his first day off, August 1, after touring the beaches and green mountains of San Vicente de la Barquera, he turned on his laptop and got to work. Astrophysicist Luca Costantin went on vacation to the Spanish region of Cantabria last summer.
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