What Has James Webb Telescope REVEALED About The Distant Galaxies

What Has James Webb Telescope REVEALED About The Distant Galaxies

The James Webb Space Telescope has provided a window into eons past, capturing a new image that shows the oldest of the galaxies ever observed. Incredible new images from NASA's James Webb Space Telescope, have given us the furthest — and clearest — view ever of deep space. Moreover, using its incredibly sensitive NIRCam instrument, the infrared space observatory found a 13.5 billion-year-old galaxy only days after its science operations began. Now, the space observatory is ready to provide us with some closer facts about these distant galaxies. So, let’s talk about them!
Welcome to Space World. In today’s video we are going to talk about what has James Webb revealed about the distant galaxies in space. So, if you want to know more about it then stay with us until the end of the video.
NASA built its state-of-the-art James Webb Space Telescope to peer into the distant Universe and back towards the dawn of time — and it’s already doing so spectacularly. In the two weeks since Webb’s first science images and data became available for astronomers to work with, they have reported a flood of preliminary discoveries, including multiple contenders for what could be the most distant galaxy ever seen.
So, Webb’s images reveal a wealth of galaxies glimmering in the distant cosmos, appearing as they did just a few hundred million years after the Big Bang, 13.8 billion years ago. Moreover, The telescope’s astonishingly sharp pictures have shattered astronomers’ preconceptions about the early Universe.
“We had in mind an idea of what galaxies at these [distances] would look like, and how much detail we’d be able to see, but I think the reality is just kind of blowing our mind,” says Jeyhan Kartaltepe, an astronomer at the Rochester Institute of Technology in New York.
So, Astronomers are now discovering record-breaking distant galaxies by the dozen while sifting through the treasure trove of data now being collected by the James Webb Space Telescope. Prior to the launch of the James Webb Space Telescope, the most distant confirmed galaxy known was GN-z11, which astronomers saw as it was about 420 million years after the Big Bang, giving it what astronomers call a redshift of 11.6. Redshift describes how much the light coming from a galaxy has been stretched as the universe expands. The higher the redshift, the farther back in time we see a galaxy.
In addition, Just a week after the release of the first science images from JWST, astronomers were reporting the detection of galaxies at redshift 13, equating to about 300 million years after the Big Bang. Now, a new wave of scientific results is smashing past that record, with some astronomers reporting the detection of galaxies up to a redshift of 20. If true, then we are seeing these galaxies as they existed about 200 million years after the Big Bang.
That's a big if: At this stage, none of these redshift values are confirmed. To confirm the distances of these galaxies will require spectroscopic analysis, which splits the light from an object into what scientists call a spectrum. That analysis will come later. Nevertheless, it seems clear that JWST is fully capable of detecting galaxies from this long-lost era.
The galaxies have been detected using different techniques. Astronomers led by Haojing Yan of the University of Missouri-Columbia used the gravitational lens created by the galaxy cluster SMACS J0723 to detect 88 candidate galaxies beyond a redshift of 11, including a handful estimated to be at a redshift of 20. If validated, these galaxies would be, by far, the most distant ever detected. Because of cosmic expansion, today these galaxies would be over 35 billion light-years away from us.
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