When one converts to distance using parsecs, it seems you're using a one-to-one conversion, i.e., linear, when we know the expansion of the universe not only isn't linear but its changing. I'm trying to understand the implications of inflation in the ever-expanding universe, with its accelerating expansion rate. What I was trying to get at was where, within the 93 billion light years framework of the universe, we would place the position13.3 billion object. The actual physical location of the object whose light we are observing won't be known to us for 13.3 billion years, which is when that light will reach us we only can observe it as it was 13.3 billion years ago - that is our current reference frame and reality.I understand we're seeing it as it looked 13.3 billion years ago, and that's it is no longer in existence. Note that the age of the universe is a time measurement and it's about 13.7 billion or so "years" old (not light-years). The light we see is from an object about 4 billion parsecs distance. Harmonograms said:Instead of light-years, which is simply a yard stick equal to the distance light travels in one year, convert it to parsecs. The astronomers' next task is to use their technique to unveil even more of these first galaxies, revealing how they worked in unison to bathe the universe in light. The team also made out a trace of the galaxy's structure: a compact glob built from three main spurs of star-birthing gas and dust. This enabled them to detect JD1's age, distance from Earth and elemental composition, as well as estimate how many stars it had formed. To discover JD1's first stirrings from beneath its hydrogen cocoon, the researchers used the JWST to study the galaxy's gravitationally lensed image in the infrared and near-infrared spectra of light. "Ultra-faint galaxies such as JD1, on the other hand, are far more numerous, which is why we believe they are more representative of the galaxies that conducted the reionization process, allowing ultraviolet light to travel unimpeded through space and time," Roberts-Borsani added. James Webb Space Telescope hit by large micrometeoroid 19 jaw-dropping James Webb Space Telescope images The James Webb Telescope detected the coldest ice in the known universe - and it contains the building blocks of life "As such, while important, they are not thought to be the main agents that burned through all of that hydrogen fog. "Most of the galaxies found with JWST so far are bright galaxies that are rare and not thought to be particularly representative of the young galaxies that populated the early universe," first author Guido Roberts-Borsani, an astronomer at UCLA, said in the statement. Yet because the first galaxies used so much of their light to dissipate the stifling hydrogen mist, what they actually looked like has long remained a mystery to astronomers. From the eddies of this cosmic sea-foam, the first stars and galaxies clotted, beaming out ultraviolet light that reionized the hydrogen fog, breaking it down into protons and electrons to render the universe transparent again.Īstronomers have observed evidence for reionization in many places: the dimming of brightly flaring quasars (ultrabright objects powered by supermassive black holes) the scattering of light from electrons in the cosmic microwave background and the infrequent, dim light given off by hydrogen clouds. In the first hundreds of millions of years after the Big Bang, the expanding universe cooled enough to allow protons to bind with electrons, creating a vast shroud of light-blocking hydrogen gas that blanketed the cosmos in darkness.
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