Moreover,
Blow: finally, universe will disappear:
If the universe had the Big Bang for origin, will it experience an end? However, And above all, when? However, Scientists have established a potential “death” date that could be closer to what we thought.
In the book The last restaurant before the end of the worldfrom the saga of Galactic traveler guidethe heroes find themselves in a particular establishment. For example, located very far in the future, where the guests can attend the destruction of the universe, well sheltered in a time bubble, listening to music.
Except that the author, Douglas Adams, never specifies when this future takes place! For example, A study put in prepublication on the Arxiv server. Consequently, and of which Space echoes, argues that this date would actually be more “close” to us than what we thought – in 33 billion years at most.
blow: finally, universe will disappear
The universe has a start, and therefore an end? – Blow: finally, universe will disappear
There are many debates over the duration of the universe. For example, They largely depend on the definition. However, characterization of dark energy, a poorly known phenomenon which would result in the expansion of the universe. For example, The theory of the Big Bang wants the universe to have been deployed from a single point. Furthermore, that it extends to a speed greater than that of light, and that one day, it ends up collapsing on itself.
For this study. scientists relied on data from the Dark Energy Survey (des) program which maps several hundred millions of galaxies thanks to several telescopes distributed around the world. They also used the Dark Energy Spectroscopic Instrument (Desi), installed at the Kitt Peak Observatory, Arizona. This instrument’s mission is to better understand the expansion of the universe and to check the cosmological models.
The researchers exploited this data. applied the cosmological constant, a parameter defined more than a century ago by Albert Einstein which corresponds to a greatness measuring the expansion of the universe. The nuance here is that they have decreased this constant taking into account an blow: finally, universe will disappear extremely light particle: an axion. This is a possible candidate to constitute dark matter, but her existence has never been proven.
That said, the researchers believe, in their model, that it exists and that it permeates the entire universe.
A big crunch still hypothetical
In this model. axions are starting to dilute with the expansion of the universe which therefore begins to slow down. The cosmological constant, which has become negative, then takes over and the universe ceases to grow to contract. This tilting should occur within 10 billion years. In other words, the universe aged 13.8 billion years has already exceeded half of its expansion time. Then. the phase of the “Big Crunch” begins with a collapse which results in the end by a kind of Big Bang upside down, the whole universe gathering at a single point.
It remains to be seen to what extent this scenario is reliable. The authors recognize that their estimate of blow: finally, universe will disappear the remaining existence of the universe depends a lot on the data recovered by. desi.
However, these are only preliminary data which must be confirmed, and tested under different conditions. Good news, however: ” Many projects measuring the different aspects of dark energy are planned for the near future. We expect a lot to obtain a more precise definition of the existence of the universe ». Even if, of course, all this will be without us.
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