Oldest pseudo-stars found complicating universe study

Over the course of two years, the "Euclid" telescope detected 31 sub-stellar objects, including two the oldest known examples, from which light was emitted when the universe was only about 670 million years old—that is, approximately 13.8 billion years ago. This discovery aids in understanding the earliest stages of the universe’s emergence. These objects are the cores of primitive galaxies containing supermassive black holes, emitting enormous amounts of energy that make them brighter than millions of suns. Studying them contributes to our understanding of how the first galaxies formed and how the early universe evolved. Scientists aim to use the James Webb Space Telescope to study these objects more deeply and hope to find even older stellar remnants to enrich the historical record of the universe’s earliest phases.

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