The small galaxy is only a fraction of the size of our own. It's nearly as old as the universe, at about 13 billion years, and due to its isolation, astronomers look at it like a “living fossil” from the beginning of the universe.
The term "living fossil galaxy" is not a commonly used scientific term, but it seems to be a phrase used to describe galaxies that have remained relatively unchanged over long periods of cosmic time. It draws an analogy to living fossils on Earth, which are organisms that have survived with little change over millions of years, such as the coelacanth fish or the horseshoe crab.
In the context of galaxies, a "living fossil galaxy" would refer to a galaxy that has retained many of its original properties and characteristics since its formation, despite the dynamic and evolving nature of the universe. This could include features such as its structure, stellar populations, and star formation activity.
Galaxies evolve over time through various processes, such as mergers with other galaxies, interactions with their surroundings, and the ongoing formation and evolution of stars. However, some galaxies may have experienced minimal disruption or have been located in relatively isolated regions, allowing them to preserve their original characteristics over billions of years.
One example often cited as a potential living fossil galaxy is the galaxy UDFy-38135539, also known as "Hubble Ultra Deep Field Object 38135539." This galaxy, discovered in 2012, is believed to have formed roughly 600 million years after the Big Bang and appears to have undergone little change since its formation. It exhibits a high level of order and symmetry, resembling galaxies seen in the early universe.
It's important to note that the concept of a "living fossil galaxy" is more of a metaphorical or descriptive term rather than a precise scientific classification. It highlights the intriguing possibility that some galaxies may have managed to preserve their original properties over cosmic timescales, offering astronomers a unique glimpse into the early universe.
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The small galaxy is only a fraction of the size of our own. It's nearly as old as the universe, at about 13 billion years, and due to its isolation, astronomers look at it like a “living fossil” from the beginning of the universe.
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The term "living fossil galaxy" is not a commonly used scientific term, but it seems to be a phrase used to describe galaxies that have remained relatively unchanged over long periods of cosmic time. It draws an analogy to living fossils on Earth, which are organisms that have survived with little change over millions of years, such as the coelacanth fish or the horseshoe crab.
In the context of galaxies, a "living fossil galaxy" would refer to a galaxy that has retained many of its original properties and characteristics since its formation, despite the dynamic and evolving nature of the universe. This could include features such as its structure, stellar populations, and star formation activity.
Galaxies evolve over time through various processes, such as mergers with other galaxies, interactions with their surroundings, and the ongoing formation and evolution of stars. However, some galaxies may have experienced minimal disruption or have been located in relatively isolated regions, allowing them to preserve their original characteristics over billions of years.
One example often cited as a potential living fossil galaxy is the galaxy UDFy-38135539, also known as "Hubble Ultra Deep Field Object 38135539." This galaxy, discovered in 2012, is believed to have formed roughly 600 million years after the Big Bang and appears to have undergone little change since its formation. It exhibits a high level of order and symmetry, resembling galaxies seen in the early universe.
It's important to note that the concept of a "living fossil galaxy" is more of a metaphorical or descriptive term rather than a precise scientific classification. It highlights the intriguing possibility that some galaxies may have managed to preserve their original properties over cosmic timescales, offering astronomers a unique glimpse into the early universe.
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