The article discusses a fascinating new solution derived from Einstein’s general relativity equations, proposing the existence of hypothetical gravitational stars known as “nestars,” which could be arranged in a stacked fashion akin to Russian matryoshka dolls. This concept emerges from the earlier theoretical idea of “gravastars,” compact bodies featuring dark energy cores, which were theorized in 2001 as an alternative to black holes.
Gravastars are described as resembling black holes in compactness and gravitational influence but differ in significant ways. Unlike black holes, gravastars lack event horizons, meaning they don’t trap light and information behind a one-way boundary. Additionally, gravastars are theorized to lack singularities at their centers, instead positing cores of dark energy.
The newly proposed “nestars” take this concept further by suggesting a stacking of gravastars, potentially leading to a thicker shell of matter compared to the near-infinitely thin skin posited by the original gravastar theory. While the theoretical framework allows for the existence of such objects, their creation remains a mystery.
Theoretical physicists involved in this research highlight the importance of exploring such mathematical solutions, even if the physical realization of these objects is uncertain. The study not only expands our understanding of black holes and alternative cosmic objects but also underscores the ongoing relevance of Einstein’s century-old theory of general relativity.
Published in the journal Classical and Quantum Gravity on February 15, this research represents a significant contribution to theoretical astrophysics, showcasing the enduring legacy of Einstein’s groundbreaking work.
