thanks to gravitational lensing it would see many galaxies 250 million years after the Big Bang

More than a month ago, the first publications related to the observations of the James-Webb telescope began to be deposited on the Internet, in search of primordial galaxies less than 500 million years after the end of the Big Bang. ArXiv. These were articles available to the scientific community but had not yet passed the first peer review filters, astrophysicists and cosmologists, of the teams behind these articles.

Caution was requested. But it was also necessary to realize that these teams had sometimes been in the making for years and included experienced researchers who had already started with Hubble telescope observations of the most distant galaxies accessible by instruments in the noosphere at some point in their development. .

Primitive galaxies that disprove the existence of dark matter?

As Futura explained in a In the previous article, reports of discoveries of already large galaxies at spectral redshifts, which researchers evaluate with a parameter called “z,” seemed surprising to some. They potentially challenged the standard cosmological model with dark matter.. In fact, it suggests orders of magnitude for the number of galaxies of a given size and in a given period of the history of the observable cosmos, based on theories of the birth and growth of galaxies. Let us now remember, as we will see in more detail later, that a spectral shift is all the greater when the light comes from a distant galaxy observed as it was in a much older past.

Some rather tend to think, although it is not yet proven, that the standard cosmological model called the ΛCDM model is not favorable to the observation of a large number of galaxies that have already reached a large size at values ​​of z greater than 7-11, as explained at the time…

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