Italian Astronomers Discover Distant Fossil Galaxy
A group of astronomers from Italy has uncovered a fossil galaxy located approximately 3 billion light years away, making it the furthest object found beyond our local area in space.
This newly identified fossil galaxy, named Kids J0842+0059, was detected by the National Institute of Astrophysics of Italy utilizing a significant binocular telescope situated on Mount Graham in Arizona.
Telescopes are generally designed for the primary goal of spotting stars and planets that exist beyond our solar system. However, even with advanced technology, capturing the light from these distant entities can be a lengthy process.
And even if that light arrives at a nearby system, researchers emphasize that various factors could potentially nullify the discovery.
“By sheer chance, these galaxies did not merge with others and remained relatively intact over time. Such objects are incredibly rare because, as time passes, the likelihood of merging with another galaxy increases,” a study on the discovery noted.
Chiara Spisiello, a researcher from the University of Oxford, mentioned that galaxies require “early bursts of star formation” for their development.
The vestiges of these early stages include objects that “formed at least 75% of their mass in the initial phase,” almost entirely bypassing the second phase, as Spiniello explained.
This latter phase is typically skipped when nearby galaxies start to interact, leading to potential combinations or absorptions that alter their overall shape, size, and star populations.
Standalone fossil galaxies are often ancient, compact, and dense, containing their own stars and planets.
“These galaxies house billions of stars similar in size to our sun, yet they do not generate new stars—they essentially remain dormant, serving as records of the ancient universe. They formed during a time when the universe was quite young. For reasons we don’t fully understand, they did not undergo interactions or mergers with other systems, allowing them to evolve independently,” Spiniello elaborated.
The reasons for skipping the second phase, which usually prompts interaction, remain ambiguous. Some scientists propose that powerful winds may have formed, isolating these galaxies and limiting star formation.
Given the immense distance, the light from this galaxy represents its state as it was three billion years ago, at the time of its creation.
Spisiello hopes these galaxies will remain unchanged indefinitely, although there’s uncertainty surrounding what might prevent them from interacting with other galaxies in the future.
