Recently, a space observatory discovered a galaxy located at a distance of 35 billion light-years from Earth.
Even though the James Webb Space Telescope started work relatively recently, it continues to beat its records for studying space and time. Recently, a telescope discovered a potential galaxy located at a distance of 35 billion light-years from Earth. If this information is confirmed, it will be the most distant object ever discovered. At least for now.
The JWST telescope is designed to look much deeper into space and time than any other technology in previous years, so it is not surprising that it has found the most distant galaxy ever observed. The galaxy, called CEERS-93316 (if, of course, its existence is confirmed), is located at a distance of about 35 billion light-years from us. We now see it as just 235 million years after the Big Bang. That is, at the time when the first galaxies are believed to have begun to form and only 135 million years after the birth of the first stars.
But it’s an apparent paradox – if the universe is 13.8 billion years old, how could anything be older than that? The light should not have had time to reach us. But the fact is that since light first left the galaxy about 13.6 billion years ago, the Universe has dramatically expanded, so the “correct distance” to CEERS-93316 is now 35 billion light years.
The expansion of the Universe is pulling out light waves, shifting them towards the red end of the spectrum. Astronomers measure this “redshift” with so-called z-values. Anything with a z value greater than 10 appeared in the first few hundred million years after the Big Bang. Currently, the only officially registered galaxy in this range is GN-z11. According to the Hubble and Keck Observatory 1 measurements, its z-value is 11. However, CEERS-93316 surpassed it, showing a z-value of 16.7.
That’s just to search for such distant galaxies and designed telescope “James Webb”. It is equipped with the most oversized segmented mirror in the history of astronomy with a diameter of 6.5 meters and infrared instruments that make it possible to observe dim red galaxies better than any other observatory.
Perhaps the best demonstration of JWST’s capabilities is the speed at which this space-based observatory continues to break its records. Object CEERS-93316 is the most recent and current record holder. Before that, two other studies, published earlier in July, found candidate galaxies with redshifts z = 12.3 and 13. Each of them already held the absolute record, albeit for a short time.
However, none of these objects has yet been confirmed as a galaxy. Be that as it may, it is unlikely that CEERS-93316 will hold the record for long. As James Webb looks deeper into the depths of space, constantly increasing the number of observations, he will find ever dimmer galaxies and objects that will help us better understand the earliest stages of the universe’s evolution.