2024-02-24 05:00:16
Imagine celestial objects so strange that they could be compared to cosmic Russian dolls, where one mysterious star hides inside another. This is precisely what researchers from Goethe University in Frankfurt have just proposed with their théorie (The word theory comes from the Greek word theorein, which means “to contemplate, observe,…) on the “nestars”.
For more than a century, black holes have captivated and intrigued. These points of no return, where All (The whole understood as the whole of what exists is often interpreted as the world or…) what ventures there disappears forever, pose serious puzzles for physicists. The first photograph of a black hole (In astrophysics, a black hole is a massive object whose gravitational field is so intense…) in 2019 was a revolution, giving us a first-hand glimpse of these elusive phenomena.
Credit: Goethe University Frankfurt
But what would happen if black holes were not the only actors in this cosmic play? In 2001, an alternative theory presented gravastars: objects as dense as black holes but without their most problematic features, such as the central singularity defying the laws of physique (Physics (from the Greek φυσις, nature) is etymologically the…). These Gravastars would have a surface (A surface generally refers to the surface layer of an object. The term a…) solid and a heart filled with energy (In the common sense, energy designates everything that allows us to carry out work, make energy, etc.) exotic repulsive matière (Matter is the substance that makes up any body having a tangible reality. Its…)thus avoiding the unfathomable trap of black holes.
It is in this context that nestars enter the scene, thanks to the innovative work of Daniel Jampolski and Professor Luciano Rezzolla. These theoretical objects would be like gravastars nested within each other, offering a complex structure. Although this may seem like something straight out of a novel science-fiction (Science fiction, pronounced /sjɑ̃s.fik.sjɔ̃/ (abbreviated to…)this idea helps scientists explore new ways of understandingUniverse (The Universe is the totality of everything that exists and the laws that govern it.).
The exploration of nestars and their unique characteristics could shed light on still unknown aspects of general relativity (General relativity, based on the principle of general covariance…) and the Universe itself. Even if these objects did not actually exist, their study enriches our understanding of extreme phenomena, such as black holes, and of the very structure of our cosmos.
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