Jakarta, CNNI Indonesia —
Telescope James Webb (JWST) detects light that has traveled 13.4 billion years. Light these come from the first galaxies that appeared just 350 million years after the Big Bang.
“For the first time, we have found a galaxy that appeared just 350 million years after the Big Bang. We can also be completely sure of that fantastic distance,” said astronomer Brant Roberttson of the University of California at Santa Cruz. Scientific alarm.
“Being able to find such beautiful photos of galaxies is an amazing experience,” he added.
This discovery of galactic light from the early universe was made possible by the cutting-edge technology of the James Webb telescope. The telescope is designed to detect the spectrum of infrared light and near-infrared light from outer space objects.
Experts believe that before the birth of stars, the universe was full of opaque material and light scattered free electrons and could not flow freely. The particles gradually combine to form neutral hydrogen.
As stars begin to form, they ionize hydrogen and emit light. This process was completed about 1 billion years after the universe formed into anything.
The lights usually appear very dim because they travel great distances. Also, due to the expansion of the universe, light stretches to become longer and redder, which is called a redshift.
It was that light that James Webb could detect. After it was detected, the research team then split the light into nine wavelengths and then focused on four galaxies with a high redshift (2 of the four galaxies were identified by the Hubble Telescope).
JWST data confirms that the two galaxies are the most distant ever detected. Meanwhile, the other two galaxies are even further away.
‘It was crucial to demonstrate that these galaxies did indeed inhabit the early universe. This is because it is very likely that closer galaxies are masquerading as distant galaxies,’ said astronomer Emma Curtis-Lake of the University of Hertfordshire.
“It was a great achievement on this mission to see the spectrum of the galaxy appear as we expected. It confirms that these galaxies are indeed at the edge of our vision, even further away than Hubble can detect,” he added.
To collect IFL Science, this most distant galaxy is called JADES-GS-z13-0 and is now 33 billion light-years from Earth. In addition to the question of distance, data on this galaxy also provides information about its mass.
Experts estimate that these galaxies have a mass of about 100 million suns and that the mass is less than 100 million years old. They ionize the gaseous hydrogen that surrounds them quickly and nimbly.
“This is by far the weakest infrared spectrum ever detected,” said one of the study’s authors, Stefano Carniani. ‘These spectra reveal what we had hoped for: a precise measurement of light waves from dispersed intergalactic hydrogen,’ he added.
