A physical body might be able to cross a wormhole in spite of the extreme tidal forces, suggests a new study by Rubiera-Garcia, of Instituto de Astrofísica e Ciências do Espaço (IA), and his team. This result, published on April 28 in the journal *Classical and Quantum Gravity*, is supported by the fact that the interactions between different parts of the body that hold it together are preserved. The team was invited by the journal editors to write an insight article that was published online today.

In their previous work, the authors arrived at theoretical descriptions of black holes without a singularity, the bizarre and infinitesimally small point where space and time ends abruptly. What they found at the centre of a black hole, and without actually being in search of one, was a spherical and finite sized wormhole structure.

Diego Rubiera-Garcia, of IA and Faculdade de Ciências da Universidade de Lisboa, commented on how the team solved the singularity problem: "What we did was to reconsider a fundamental question on the relation between the gravity and the underlying structure of space-time. In practical terms, we dropped one assumption that holds in general relativity, but there is no a priori reason for it to hold in extensions of this theory."

Presented with this wormhole structure of finite size, where space and time continue past and beyond the black hole and into another part of the universe, the authors then inquired about the fate of a physical object venturing into it. They asked if a chair, a scientist, or a spacecraft would withstand the intense gravitational field and retain physical unity through the journey, and also to what extent that body would be damaged.

In their study, a physical body approaching a black hole is analysed as an aggregation of points interconnected by physical or chemical interactions holding it together.

"Each particle of the observer follows a geodesic line determined by the gravitational field. Each geodesic feels a slightly different gravitational force, but the interactions among the constituents of the body could nonetheless sustain the body," Rubiera-Garcia said.

General relativity theory predicts that a body approaching a black hole will be crushed along one direction and stretched along another. As the wormhole radius is finite, the authors demonstrate that the body will be crushed to the size of the wormhole. Instead of converging to an infinitesimal separation, the so-called singularity, geodesic lines will still be separated by a distance greater than zero.

In their work, the authors show that the time spent by a light ray in a round trip between two parts of the body is always finite. Thus, different parts of the body will still establish physical or chemical interactions and, consequently, cause and effect still apply all the way across the throat of the wormhole.

We can then imagine that finite forces, no matter how strong they would have to be, could compensate for the impact of the gravitational field near and inside the wormhole on a physical body traversing it. At least, according to these study, the passage to another region of the universe might be feasible.

Francisco Lobo, of IA and Faculdade de Ciências da Universidade de Lisboa, leader of the Cosmology group at IA, said, "The authors' insights into the concepts of space-time singularities and curvature divergences are representative of the fundamental theoretical research carried out at the IA, going beyond Einstein's General Relativity. This research will also probably be important to understanding these difficult concepts for the fate of the universe in a plethora of cosmological models."

**Explore further:**
The golden anniversary of black-hole singularity

**More information:**
Gonzalo J Olmo et al. Impact of curvature divergences on physical observers in a wormhole space–time with horizons, *Classical and Quantum Gravity* (2016). DOI: 10.1088/0264-9381/33/11/115007

Gonzalo J. Olmo et al. Geodesic completeness in a wormhole spacetime with horizons, *Physical Review D* (2015). DOI: 10.1103/PhysRevD.92.044047

## bschott

Peer reviewed.... Jesus. Theoretical astrophysics is so far gone from reality... that this is the script of a shitty "C" movie which actually loses to the Sharknado trilogy for likelyhood to be possible.

And people actually pay tuition money tuition to learn to write this.....BLAHAHAHAHAHA!!!!!

Boy am I glad I stopped back in to read this one, if you make 2 + 2 = 5.....anything is possible! IT"S THE NEW MATH!!!!

## Tuxford

## ursiny33

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## FainAvis

## AlbertPierrepointOBE

It's time to create a site that is what PO was before it was sold to the pimps.

## bschott

This site just posted an article about a peer reviewed paper based on math that describes what COULD happen IF we suspend the standard model...in other words peer reviewed sci-fi...are you referring to the "nutter fringe" that has a problem with this?

Not really that thought provoking....but the second part of the above quote describes the followers of this rediculous garbage to perfection.

Yes!!! Go! Doooo iiit.

And take anyone who thinks this absolute crap is science with you.

## antialias_physorg

Still, this might mean the forces required could be very large.

Also the asymmetry of forces might be an issue. E.g an asymmetric force applied within an atomic nucleus might well lead to radioactive decay in otherwise stable atoms, because the stability is not only dependent on forces between individual nucleons but the distribution (read summation) of forces accross the whole nucleus.

## ursiny33

## ursiny33

## ursiny33

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## ursiny33

## bschott

The complete lack of actual physics applied to theoretical physics, as noted by the math fairy tale above.

What are you talking about? Every comment I post bashes the "certified thinkers" who wrote the paper the article is about and the people who follow it blindly, and the "certified thinkers" who passed it through peer review as actual science.

This paper is about math only. Any physicist well tell you that applying the standard model of physics breaks down past the event horizon...of a hypothetical object...

Precisely.

I assume this is supposed to say "quit crying"...I only cry when joy overwhelms me.

There are no mechanics or magnetic thinking that associate to the fiction above.

## ursiny33

## ursiny33

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## nikola_milovic_378

Jun 13, 2016## shavera

For instance, work in a specific branch of GR (Anti deSitter spacetime) doesn't necessarily describe our universe. But it was found out that the same maths are a useful tool for doing work in strong force physics. (The AdS-CFT correspondence). Science is about curiosity, and sometimes that curiosity goes into directions that are directly applicable to something we may observe, and sometimes it's curiosity about a thing that may be implied by some aspects of the theory while ignoring other parts.

## bschott

If theoretical work doesn't apply in our universe, what are you defining as "more broadly"?

I agree that science is about curiosity, but curiosity is the desire or compulsion to learn something which you observe but do not understand, and when you think you have the answer, attempt to verify it. Not mathematically create a "reality", then attempt to verify it....mathematically.

I am in awe of the ability of the people who derive the accurate equations which do indeed describe observed phenomena, that is math that is also science and worthy of praise. However, math which describes a hypothesis isn't science until it is tested physically for accuracy.