According to general relativity framework observations, Albert Einstein introduced a cosmological constant in 1917 to counterbalance gravity and preserve a static universe model, a parameter later revived by astronomers in 1998 to explain the accelerating expansion of the cosmos driven by dark energy. General relativity originally described a dynamic cosmos expanding or contracting, yet prevailing … Read more
When two black holes collide, they do not simply vanish into silence; they ring like a struck bell, shedding energy through gravitational waves in a process known as “ringdown.” According to a review, scientists are now using these fading vibrations to perform “black hole spectroscopy,” turning the aftermath of cosmic mergers into a precision laboratory … Read more
Physicists at Penn State have proposed a new framework to calculate the entropy of black holes, moving beyond the 50-year-old paradigm established by Stephen Hawking. By replacing “event horizons” with “dynamical horizons,” the research team provides a method to measure thermodynamics in black holes that are actively merging, growing, or evaporating, according to a study … Read more
Theoretical physicists have developed a new model demonstrating that collapsing stars could potentially form “gravastars” instead of black holes, offering a solution to the mathematical paradoxes of singularities. According to research published in Physical Review D by Daniel Jampolski and Luciano Rezzolla of Goethe University Frankfurt, a star’s collapse can be halted by an expanding … Read more