The James Webb Space Telescope (JWST) has accomplished yet another feat after dazzling the globe with its first scientific photos of star formation, death, and an area of sky packed with thousands of ancient galaxies. The oldest galaxy in the cosmos has been found by the most powerful telescope on Earth.
When the universe was just 300 million years old, or infancy in cosmic terms, Webb discovered galaxy candidates. Researchers have identified two possibilities for the earliest galaxies in the cosmos, GLASS-z11, and GLASS-z13, by analyzing data from the Grism Lens-Amplified Survey from Space (GLASS), a component of the Webb telescope’s early scientific activity.
It has taken the light from GLASS-z13, which is about 15,00,000 kilometers distant from Earth, 13.4 billion years to reach the mirrors of the spaceship.
The fact that the galaxy is currently placed close to 33 billion light years distant from us, even though light took over 13 billion years to reach us, is even more astounding given how quickly the universe is expanding. The subject of when and how the earliest galaxies originated has not yet been satisfactorily resolved by astronomers, and it continues to be a fascinating one.
The only galaxy that was proved to have been in the first few hundred million years following the Big Bang, when our universe first began, is still GNz11.
Researchers from the Harvard-Smithsonian Center for Astrophysics, under the direction of Rohan Naidu, claim that GLASS-z11 exhibits a stretched exponential light profile that may be compatible with a disc galaxy. “Some of the earliest JWST/NIRCam datasets that have been detected and made available across extragalactic areas form the basis of our research. We examine the two Early Release Science projects GLASS and CEERS in detail “According to the team’s preprint publication.
The numbers 11 and 13 stand for the galaxy’s redshifts, which are measurements of how much the universe’s expansion has stretched the light from these galaxies. The galaxy’s greater redshift suggests that it is located distant from Earth. Although the study has not yet undergone peer review,
The Near Infrared Spectrograph (NIRSpec) instrument on the Webb spacecraft will probably be used by researchers to learn more about these two possibilities. The scientists wrote in the publication, “Deep JWST surveys may find reasonably bright galaxies too, far earlier epochs than may have been predicted.”