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The earliest forming cluster of galaxies discovered. It's 13 billion light years away

25 September 2019
SISSA scientist Darko Donevski took part in the research

Using the Subaru, Keck, and Gemini Telescopes, an international team of astronomers has discovered a collection of 12 galaxies in the constellation Cetus which existed about 13.0 billion years ago. This is the earliest protocluster ever found. One of the 12 galaxies is a giant object, known as Himiko, which was discovered a decade ago by the Subaru Telescope and named for a legendary queen in ancient Japan. This discovery suggests that large structures such as protoclusters already existed when the Universe was only about 800 million years old, 6 percent of its present age. SISSA researcher Darko Donevski is one of the research authors. The study will be published in "The Astrophysical Journal".