What is on other side of black hole
Pro Research Analysisby 
Searched over 200M research papers
Exploring the Other Side of a Black Hole
Schwarzschild Black Hole Singularity and Antigravity
The concept of what lies beyond a black hole's event horizon has intrigued scientists for decades. Recent research on the Schwarzschild black hole suggests that the other side of the singularity could be a region of antigravity. This is based on the geodesical completion of the Schwarzschild black hole in four dimensions, which covers the entire space in Kruskal-Szekeres coordinates. The gravitational constant switches sign abruptly at the singularity, indicating a transition to a region of antigravity. This phenomenon is predicted by local (Weyl) scale invariant geodesically complete spacetimes, which aim to improve classical general relativity and string theory.
Traversable Wormholes and Interconnected Spacetimes
Another fascinating possibility is the existence of traversable wormholes, which could connect two different spacetimes. If such a wormhole exists, the flux cannot be conserved separately in each space, meaning objects in one space would influence those in the other. This has significant implications for gravitational fields, as studying the orbits of stars around the black hole at the center of our galaxy could reveal whether it harbors a traversable wormhole. For instance, a star orbiting on the other side of the wormhole could leave detectable imprints on the orbits of stars on our side.
Observational Evidence and Future Prospects
Observing the shadow of a black hole, such as the one at the Galactic Center (Sagittarius A*), can provide indirect evidence of what lies beyond. The event horizon casts a shadow due to the bending of light, and this shadow is nearly independent of the black hole's spin or orientation. With advancements in very long baseline interferometry at submillimeter wavelengths, there is a realistic expectation of imaging the event horizon of a black hole, which could offer more insights into the nature of black holes and the regions beyond their singularities.
Conclusion
The other side of a black hole remains a topic of intense research and speculation. Theories range from regions of antigravity to interconnected spacetimes via traversable wormholes. Observational advancements, such as imaging the event horizon, hold promise for uncovering more about these enigmatic regions. As our understanding of black holes deepens, so too will our comprehension of the universe's most mysterious phenomena.
Sources and full results
Most relevant research papers on this topic