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The universe was born from a thawing


A German theoretical physicist has proposed a non-standard model of the creation of the universe: its origin has not been an extremely hot and dense phase, but a phase of slow and cold processing . The model also denies that the universe is expanding.

cosmic background radiation

In this map of the cosmic background radiation, the white bars indicate the direction of polarization of the oldest light in the Universe.

Credit: NASA / WMAP Science Team

Anyone who thinks that the Universe was born 13.8 billion years ago with the Big Bang could be mistaken. For decades, indeed for almost a century, the “great explosion” was the beginning of everything, the theory that it put together almost the entire scientific community. For decades the argument, however, is still the focus of academic debate and recently a German theoretical physicist at the University of Heidelberg, Christof Wetterich , brought on the tables of the experts a new theory : the universe would not be born from a violent explosion and would not be in continuous expansion. Forget everything you know about the cosmic microwave background radiation, the singular nature of space and time, the expansion of the Universe. This model implies that the masses of all particles are constantly increasing and that, instead of expanding, the universe is shrinking for extended periods of time.

According to the German physicist of the Universe is the result of a long, cold period of transformation and that has nothing to do with the cosmological model of the Big Bang, which predominates in the scientific community, and theorizes that an extremely hot and dense initial condition by which then would begin a process of expansion lasted for a finite time interval but still ongoing today. The model we propose is the opposite Wetterich than thought so far: our Universe is not born of an explosion, but by a thaw.

The scientist in his study presents a simple model with three parameters , which does not , however, the phenomenon of gravitational singularity from which , according to many , it all began . For singularity means that point in spacetime where the gravitational field has a tendency towards an infinite value . As he had already theorized by Albert Einstein model of general relativity , the Big Bang was caused by a gravitational collapse caused by the high temperatures reached by the material. It ‘just that he wanted to disprove Wetterich .

Since 2009, the origins of the Universe are studied by the Planck satellite, the ESA mission dedicated entirely to the study of the cosmic microwave background signal originated about 13 billion years ago. Planck has the aim to determine the geometry, content, and to study the evolution of the paroxysmal phase of expansion of the universe, called “inflation”, which led him to expand in a fraction of a second to a size comparable to the current ones. Wetterich, however, goes beyond and reverses the standard model of cosmological evolution. What’s different in his theory? If the masses of all the elementary particles become heavier in the course of time and the gravitational force weakens, the Universe may have also had a very cold start phase and slow. According to this view, the universe has always existed and its first condition was virtually static and the Big Bang is nothing but a phenomenon that has spread over a very long period of time would be just one of many steps , but not the ‘ beginning. For this study it is said that the first “events” that are indirectly observable today date back to 50 trillion years ago, and in a fraction of a second after the Big Bang.

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