What are these wormholes & Black holes????

What are these wormholes & Black holes????

The space is a marvelous thing that is with millions of secrets inside it.The space has hidden secrets and hidden theories with it so that’s why it’s become an interesting field to be studied.

Have you ever thought about the tunnels in curved space-time! And also.. have you ever thought about a thing or a place that even does not let light to come out !? The answers might be “yes”! Or you may say “why not? I have been searching them with full curiosity” if you are really interested in science, Astronomy, Astrophysics, Cosmology, Space science or science fictions! There are some movies like Interstellar (2014),Star Trek (2009),Event Horizon (1997),The Black Hole (1979); that are based on those types of questions which I have mentioned earlier!

So now let’s see what these Black Holes and what those Wormholes are. Gravitational wave detectors have already spotted mysterious” Black Holes”; And also something even stranger might be exist in this space; they are wormholes. physicists has shown that wormholes are the tunnels in curved space-time which are connecting two distant places, through which traveling is possible!!!! But don’t pack your bags for a trip to the other side of the galaxy yet; although it’s theoretically possible, it’s not useful for humans to travel through! The condition of a Black Hole is really different from a wormhole.

A black hole is a place in space where gravity pulls so much!!! Even light can not get out through a black hole. The gravity is so strong inside a black hole because matter has been squeezed into a tiny space. This can happen when a star is dying as well. Just because no light can get out, people can’t see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars. many astrophysicists suspect that black holes in that forbidden range should exist. This is because they hypothesize that stellar black holes might grow into the supermassive ones that anchor galaxies by passing through a middle stage. Black holes can have angular momentum, or “spin,” that ranges between extremes designated 0 and 1. When two similar-size black holes combine, the spin of the resulting black hole is most likely to be around 0.7. The final black hole produced in the merger seen by LIGO/Virgo, for instance, had a spin of 0.72. But, tellingly, the two black holes involved in the merger had similar spins, pegged at 0.69 and 0.73, suggesting that they might have each formed in previous mergers.

Most black holes form from the remnants of a large star that dies in a supernova explosion. (Smaller stars become dense neutron stars, which are not massive enough to trap light.) If the total mass of the star is large enough (about three times the mass of the Sun), it can be proven theoretically that no force can keep the star from collapsing
under the influence of gravity. However, as the star collapses, a strange thing occurs. As the surface of the star nears an imaginary surface called the “event horizon,” time on the star slows relative to the time kept by observers far away. When the surface reaches the event horizon, time stands still, and the star can collapse no more – it is a frozen collapsing object.

So now, let’s see what wormholes are. The wormhole theory postulates that a theoretical passage through space-time could create shortcuts for long journeys across the universe. Wormholes are predicted by the theory of general relativity. But be wary: wormholes bring with them the dangers of sudden collapse, high radiation and dangerous contact with exotic matter. In 1935, Einstein and physicist Nathan Rosen used the theory of general relativity to elaborate on the idea, proposing the existence of “bridges” through space-time. These bridges connect two different points in spacetime, theoretically creating a shortcut that could reduce travel time and distance. The shortcuts came to be called Einstein-Rosen bridges, or wormholes.

Wormholes were first theorized in 1916, though that wasn’t what they were called at the time. While reviewing another physicist’s solution to the equations in Albert Einstein’s theory of general relativity, Austrian physicist Ludwig Flamm realized another solution was possible. He described a “white hole,” a theoretical time reversal of a black hole. Entrances to both black and white holes could be connected by a space-time conduit. Physicists have worked out a way that it might be feasible to send
someone through a wormhole. Wormholes are tunnels that connect distant regions of space-time, and normally it would be impossible to pass something through them, but factoring in an extra dimension might make it possible. Wormholes are a popular feature in science fiction, that means through which spacecraft can achieve faster-than- light (FTL) travel and instantaneously move from one point in spacetime to another. And while the General Theory of Relativity forbids the existence of “traversable wormholes”, recent research has shown that they are actually possible within the domain of quantum physics.

As a conclusion for the topic we’ve discussed we can say that a wormhole is a “tube made of spacetime” that connects two different regions. If it’s set up right, you could enter one side of the tube and exit the other end somewhere else, or even somewhen else. In contrast, a black hole destroys the hell out of things, and doesn’t “go anywhere”.!!!

Further reading :
https://science.nasa.gov/astrophysics/focus-areas/black-holes
https://aapt.scitation.org/doi/10.1119/1.15620

~Thilini Wathsala Thilakarathne~

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