Bob Yirka is a research scientist at Phys.org.

Researchers suggest that wormholes may look almost identical to black holes
Polarization in a vertical magnetic field for wormholes with different redshift parameter α. Each color represents the observable polarization of the orbits located at r=6M (outer ring) and r=4.5M (inner ring) for a particular wormhole solution with α∈[0,3]. The polarization for the Schwarzschild black hole is given by a black dotted line as a reference. The inclination angle is θ=20°. Credit: Physical Review D (2022). DOI: 10.1103/PhysRevD.106.104024

The reason that a wormhole has never been observed is due to the fact that they look almost identical to black holes.

The paper was published in the journal Physical Review D and was written by Petya Nedkova, Galin Gyulchev, Stoytcho Yazadjiev and Valentin Delijski.

Scientists and science fiction writers have pondered the possibility of a wormhole for a long time. A tunnel of sorts would connect two different parts of the universe. It would be possible to travel to distant destinations in ways not available to spaceships by using the tunnel.

There is no evidence that a worm hole exists. astrophysicists assume that they do exist because of the strong theory. We don't have the technology to see them or we haven't been looking for them in the right way.

The researchers in Bulgaria think that the problem is the other way around. The reason we aren't seeing them is because we think they are black holes.

The work involved studying wormhole theories and then applying findings to the creation of simulations, with an emphasis on the polarity of the light that would be emitted by such an object. They compared the images they created to black holes and found them to be remarkably similar.

It should be possible to tell black holes and wormholes apart by observing subtle differences between them.

There is a Polarized image of equatorial emission in horizonless space times. There is a book titled "PhysRevD.106.104024)."

Journal information: Physical Review D

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