Jakarta –
The faintest galaxy has been identified by the James Webb Space Telescope. This dim light is apparently influenced by its great distance from Earth, about 13.3 billion light years.
These ancient, barely visible star clusters were born about a few million years after the Big Bang. At that time, the universe (cosmos) was shrouded in a thick black mist that even light could not penetrate, as reported in the Live Science.
An Ancient, Almost Invisible Galaxy
This galaxy, known as JD1, shines in the constellation Sculptor in the southern sky. One of these early galaxies left its source when the universe was only 4% of its current age.
Its light travels through infinite space and a dissipating cloud of gas before passing through the galaxy cluster Abell 2744. Abell 2744’s gravitational pull acts as a giant magnifying glass so that the ancient galaxy JD1 appears in focus in the James Webb telescope.
From there, the research team discovered the super distant and dim galaxy JD1. This galaxy is a dense mass formed from three main sources of gas and dust that gave birth to stars. This discovery was reported astronomer Guido Roberts-Borsani et al in the journal Nature.
Help the Universe Be Full of Light
After the first hundreds of millions of years of the Big Bang, the universe cooled considerably. As a result, protons can bond with electrons, creating a large envelope of hydrogen gas. This thick veil blocks light, so the universe is very dark.
The first stars and galaxies then clumped together, emitting ultraviolet light that re-ionizes the hydrogen cloud. This ‘burning hydrogen mist’ breaks it down into protons and electrons again. As a result, the universe can be freed from the thick veil and light can enter it.
The first galaxies used a great deal of their light to dispel the hydrogen cloud. Because of this, astronomers have not been able to determine the true form of these ancient galaxies.
Guido Roberts-Borsani, an astronomer at the University of California Los Angeles (UCLA) said scientists believe that ancient dim galaxies like JD1 are what make the universe bathe in light today.
“Most of the galaxies discovered by the James Webb telescope so far are rare bright galaxies, and are not thought to be a group of young galaxies that filled the early period of the universe.
Therefore, we predict that young galaxies are not the main party burning the hydrogen mists,” said Roberts-Borsani.
“On the other hand, super faint galaxies like JD1 are much more numerous. Therefore, we believe that these star clusters represent galaxies that reionize so that UV light radiates through space and time,” he continued.
Watch Video “Appearance of a Milky Way-like Galaxy in the Young Universe“
(two/two)
2023-06-07 13:30:00
#Super #Dim #Ancient #Galaxy #Helped #Universe #Full #Light
