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American Focus > Blog > Tech and Science > Little red dot galaxies have now been found in our local universe
Tech and Science

Little red dot galaxies have now been found in our local universe

Last updated: July 18, 2025 6:50 am
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Little red dot galaxies have now been found in our local universe
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The discovery of a peculiar type of galaxy known as little red dots (LRDs) has sparked intrigue among astronomers. Initially observed in the early universe, these small, compact, and red objects were believed to be associated with processes like the formation of supermassive black holes at the cores of galaxies. However, a recent finding has challenged this notion, as LRDs have now been detected in a more contemporary part of the cosmos.

Researchers led by Xiaojing Lin from Tsinghua University in China stumbled upon LRDs in a region of the universe that is approximately 12 billion years old, contradicting the belief that these galaxies were exclusive to the early universe. By scouring images captured by the Sloan Digital Sky Survey using a telescope in New Mexico, the team identified three objects resembling LRDs, located just 2.5 billion light years away.

These newfound LRDs exhibit characteristics similar to their ancient counterparts, with each estimated to be a million times more massive than the sun and possessing dimensions comparable to our solar system. One of the objects, dubbed “The Egg,” stands out due to its elongated shape. The researchers also uncovered a few other potential LRD candidates awaiting confirmation.

The significance of this discovery lies in the opportunity it presents for gaining deeper insights into the nature of LRDs. Given their proximity, telescopes like the James Webb Space Telescope (JWST) and Hubble could offer a clearer understanding of these enigmatic galaxies compared to their distant, faint counterparts. Anthony Taylor from the University of Texas at Austin highlights the potential brightness of these closer LRDs, making them more accessible for detailed study.

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One prevailing theory suggests that LRDs may signify the initial stages of supermassive black hole growth within a galaxy, possibly marking the onset of intense material consumption by the black hole. However, it remains uncertain whether the local LRDs have remained dormant until now or are newly emerging entities beginning to accrete substantial amounts of matter.

The research team is eager to secure observation time with Hubble or JWST to delve deeper into the characteristics of these local LRDs. The possibility that LRDs exist across various epochs of the universe raises intriguing prospects for future exploration. As Xiaohui Fan notes, these galaxies may have been present throughout cosmic history, awaiting recognition among the vast expanse of celestial phenomena.

In essence, the discovery of LRDs in a more recent cosmic epoch not only challenges existing theories but also opens up new avenues for unraveling the mysteries of these peculiar galaxies. With advanced telescopic capabilities at their disposal, astronomers are poised to shed light on the true nature and evolution of LRDs, potentially reshaping our understanding of the universe’s enigmatic inhabitants.

TAGGED:DotgalaxiesLocalReduniverse
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