The Penrose Process is where energy is extracted from black holes.

The name itself originates from Roger Penrose, who is actually the one who had come up with this idea.

Black holes rotate in angular force, which generates something called the ergosphere that is outside the horizon of the hole.

The ergosphere is where energy is gained or lost.

The Penrose Process also decays its particle, basically splits into two where one part reduces the mass energy. While the other escapes and contains more energy.

Only 20% of the energy that is extracted from the rotating black hole can be used.

Next Question

What is the specific process the black hole takes in a larger event horizon to gain more energy? Is this more efficient than getting energy from a smaller event horizon?

The event horizon is proportional to the mass of the black hole.

The black hole within the event horizon can range from 6 miles or equal to the size of our solar system.

From what I have learned, I assume that the mass determines how much usable energy we can receive. The smaller event horizon's size means the energy extraction will be less than a larger event horizon.

With rotating black holes, objects can orbit much more closely around the event horizon before slipping in, releasing up to 42% of their energy.  If the black hole is not rotating, the method will convert 6% of an object's mass into energy 

Dropping mass into a black hole is the most effective method of obtaining energy from mass, other from the use of antimatter (antimatter = molecules made up of atoms with positrons, antiprotons, and antineutrons), which is incredibly uncommon in the universe. (1 gram of antimatter is worth 62.5 trillion dollars)

Black holes are extremely tiny, but they have a lot of gravitational force.

E=mc2 means (when talking about black hole energy, or just in general) that even a small amount of mass can produce a large sum of energy. They used a cat as an example. If you could completely harness the energy, it could power Norway for a year.

As much as nuclear fission or fusion is extremely powerful and useful to us, compared to a black hole energy source it isn't that much (potential energy of fission and fusion is 0.08% and 0.7% approximately)

Question:

Do you think the efficiency of energy extraction from spinning black holes could ever be harnessed for practical use on Earth, or is it purely theoretical? What are the potential benefits and risks if it were possible?

Energy Conversion in Black Holes: 

Black holes convert mass into energy through processes governed by Einstein's equation, E=mc^2. This makes black holes some of the most efficient energy sources in the universe.

The energy can be extracted through phenomena like Hawking radiation, accretion disks, and rotational energy tapping via the Penrose Process or Blandford-Znajek Mechanism. 

The Role of Spin: 

Spinning black holes (also called Kerr black holes) generate more energy because their rotation creates an ergosphere, a region outside the event horizon where spacetime is dragged along with the spin of the black hole. 

This dragging effect allows mass and energy to interact in unique ways: 

In the Penrose Process, particles falling into the ergosphere can split, with one particle falling into the black hole and the other escaping with more energy than it originally had. This “energy boost” is caused by the rotational energy of the black hole. 

Spinning black holes convert up to 42% of the mass into energy, compared to only 6% for non-spinning (Schwarzchild) black holes. 

Why the Event Horizon Is Smaller in Spinning Black Holes: 

A black hole’s event horizon is the boundary where escape velocity exceeds the speed of light. For spinning black holes, the size of the event horizon decreases as the spin rate increases. 

This happens because the centrifugal force from the black hole’s spin counteracts gravity to some extent, allowing the event horizon to shrink.

Mathematically, the event horizon radius (r+) of a kerr black hole depends on its spin parameter “a”: 

r+=M+root of M^2 =a^2: Where m is the black hole’s mass, and a is its spin. A higher a results in a smaller r+.

Why It Matters: 

A smaller event horizon means more of the surrounding spacetime is within the ergosphere, which increases the region where energy extraction can occur. This is crucial for processes like the penrose process and Blandford-Znajek mechanism to operate efficiently. 

Smaller horizons also reduce the “dead zone” where energy is irretrievably lost, allowing more mass-energy to be converted into usable forms. 

Such energy efficiency could theoretically power advanced civilizations or be a natural power source for extreme astrophysical phenomena like quasars or gamma-ray bursts.

Applications of Spinning Black Hole Energy: 

Scientists theorize that spinning black holes could one day serve as a cosmic energy source if we ever develop the technology to harness their energy. 

Understanding spinning black holes also improves our knowledge of astrophysical events,  like supernovae, pulsars, and galaxy formation, since many rely on black hole mechanics.

Next Question:

How can theoretical models of the Penrose process of Blandford-Znajek mechanism be tested or simulated to further explore practical energy extraction from spinning black holes?

Non rotating black holes takes only 6% of an object mass and converts it into energy

while rotating black holes do up to 42%

Rotating black holes bend the fabric of space time and can orbit much closer to the event horizon before falling in

Humans can only conduct nuclear fission and fusion to convert mass into energy

dropping mass into a black hole, the object reaches fats speeds while falling into it because black holes gravitational force is very large

objects release their energy into the universe and then fall into the black hole forever.

some alien species could possibly be harnessing the energy from black holes

a 5kg object has enough energy in its mass to power an entire country for a year

rotating black holes drag objects into their direction of rotation

the objects can get much closer to the rotating black holes before entering the non rotating black holes

the black hole with the innermost possible orbit coincides with the event horizon

the event horizon itself is half as big as a non rotating black hole

Next Question

:What is the event horizon? What does it do? What would happen if there was no event horizon?

What is a Black Hole?

• Black holes are a natural consequence of Einstein’s new theory of gravity,  General relativity. This provides that the force of gravity is a result of spacetime curving.

• Think of it like a drum, with its face loose. If you place a sun in the middle, the face will make a cone shape.

• The presence of mass causes spacetime to curve around it.

• Mass curves space and also time, a clock closer to a massive object will experience slower time than the farther away clock. Even light which is considered with no gravitational  attraction can be seen bending towards the massive objects, called gravitational lensing.

• When a matter is so dense, such as a black hole, it creates a even horizon, where nothing can return once entered it. The path that leads into the center of this distortion is so beyond disrupted that even light cannot escape.

Where do we find black holes?

• Every single galaxy like the Milky Way has a supermassive black hole at its center to keep the spinning disk in line. Its mass is between a million and a billion times the mass of the sun( 2x10^30kg). When these enormous black holes release energy by pulling in the matter, they can outshine all the other stars in the galaxy.

• Black holes are one of 3 options when a massive star comes to the end of its life, a neutron star, a black hole, and a newly discovered gravastar, where its surface is not made of atoms[Gravastar - Wikipedia].

• The black hole starts forming when the star runs out of nuclear fuel to burn, and there is nothing stopping gravity from squishing it into a singularity.

Release of Energy

• When materials fall under gravity, it releases energy. When the dust and gas fall with extremely strong gravity around a black hole, an enormous amount of energy is released. This process is called accretion and accreting material usually flattens into skis that spiral into the black hole, where the accretion disk name comes from.

• Energy is released when the object is falling in, about 40% of the energy of the mass.

• The friction between the parts of an accretion disk causes it to heat up, making it glow, and emitting black body radiation. The material usually reaches around 10,000,000 ºC, causing it to emit infrared, visible, ultraviolet, and x-ray.

• The hot accretion disk becomes ionized, where electrons separate from atoms, meaning the magnetic field is frozen in the disk. The magnetic field lines are tied to a not when the material spins around the black hole and can snap, called reconnection, releasing energy that accelerates nearby particles to ultra-high energies.

• They collide with low-energy photons, and ghost their energies, emitting enormous amounts of energy.

What can we learn

• We learned about black holes and how energy is released from them when the X-ray telescope XMM-Newton launched in 1999 Chandra launched in 1999 and Suzaku launched in 2005.

• Studying the X-ray spectrum of accreting black holes allows us to see different energies emitted by different processes.

• Reflection from the accretion disk imprints several atomic features on the spectrum which we observe, not least emission lines.

An event horizon is the marking of the boundary of the limits of a black hole.

Without an event horizon, there isn't a black hole (Stephen Hawking)

During the event horizon, the speed of light is equal to the escape velocity. Nothing can ever cross the boundary because nothing is faster than the speed of light, therefore trapping it. That's why nothing can escape a black hole. 

For the non-rotating black holes, we use the Schwarzschild radius to delimit the spherical event horizon. Rotating black holes have non-spherical, distorted event horizons. 

The radiation generated inside the event horizon can never escape outside of it.

Hawking's radiation allows the particles to be radiated just outside the event horizon, even though black holes do not radiate energy themselves in general. 

Questions:

What is Hawking Radiation, and how does it relate to particle radiation?

What is the Scwarzchild Radius

Chinese astrophysics at Taijin University in China has proposed ways for humans to use black holes as an energy source.

 They published a journal named Physical Review D. Zhang-Feng Mai and Run-Qiu Yang have outlined two possible scenarios. 

Kardashev Scale: 

• Classification of civilization based on their energy consumption

• Type 1: planetary energy

• Type 2: stellar energy

• Type 3: galactic energy

Dyson Sphere:

• A structure surrounds an energy source, capturing its energy.

• Dyson Bubble:

  • A Dyson Sphere made out of millions of individual satellites, positioned to counteract the gravitational pull of the energy source, aka a black hole

Black Hole Energy Capture:

• Matter falling into a black hole will emit energy, usually in rays from all parts of the spectrum.

• The energy that falls into the event horizon will not be retrievable, but the energy outside can still be captured

• Energy Source:

  • Matter that falls into a black hole emits energy, powering a Dyson Sphere

• Accretion Disk Radiation:

  • Accretion disks around black holes emit radiation due to the heating of infalling matter

  • This will provide energy that the Dyson Sphere can capture

  • This energy output from rotating black holes can power Type 2 or 3.

Black Hole Luminosity

• The rotating black holes can emit significant energy to capture using a Dyson Sphere

• The black hole also emits energy through reativistic jets. With jets contributing a substantial portion of the total energy output.

Outer Species

• The ability to create a Dyson Sphere is only available in Type 2 or more civilizations. 

• Using our telescopes, we can detect Dyson Spheres in the night sky, helping with discovering alien life.

NEXT QUESTION: Research the Dyson Sphere, https://youtu.be/pP44EPBMb8A?si=xjqWaBkN7cL9VRE7, how does it help us to achieve a higher type civilization. 

With the use of the Penrose Process, harness energy by breaking down and recombining magnetic fields in the ergosphere.

“Virtual Particle,” is where energy is imparted from the particle-antiparticle.

Another method to harness energy is called, the “Blandford-Znajek Process” which utilizes external magnetic fields and extracts the energy within the black hole.

The efficiency that is generated in Black holes can reach up to 150%. This is the most amount of energy when compared to the methods used on earth.

Next Question

What are some resources that can utilize the energy from the black hole rather than using resources that can negatively impact Earth?

Black holes are crazy efficient at converting mass into energy, especially spinning ones. Even though, on Earth it almost seems impossible to be able to safely and correctly extract and use energy from any black hole. 

The two main processes that if we were able to use would be Penrose Process and the Blandford-Znajek Mechanism

Penrose Process: Where particles in the ergosphere are split, and one escapes with boosted energy 

Blandford: Which taps into magnetic fields and the black hole’s rotation to pull energy from the surrounding plasma 

The dyson sphere is basically referred to as a megastructure which surrounds a star, but also captures a huge amount of the power that is being released/outputted.

This dyson sphere is majorly used by spacefaring civilization because there is an energy requirement needed.

In order for a civilization to harvest or gain more energy, building structures around a star is the best choice.

Life support, transportation are a couple of examples of using the energy for a good cause/use.

A fun fact is that the Dyson sphere's name comes from the one who discovered/popularized this concept. That person is Freeman Dyson.

Freeman’s idea was intended to help detect any intelligent extraterrestrial life.

The dyson sphere is ultimately known for trapping any dark energy and reversing the expansion of the universe.

Next Question:

As the article/website talks about how type two or three civilizations use the dyson sphere, is there a possibility that we can utilize this dyson sphere on earth, which is a type zero civilization? Also is this even possible?

Creation of Black holes

• Stars are supermassive nuclear reactors that use fusion to create radioactive energy to counteract the gravitational force that is acting upon them.

• As long as there are fusion reactions in the core, a delicate balance can be achieved to stop the star from collapsing.

• When larger stars generate fusion energy, they can form iron in their cores

• The iron element’s fusion reaction does not produce any energy, unlike Hydrogen, Helium, Carbon, Neon, Oxygen, and Silicon.

• The Iron in the core keeps building up until the balance is destroyed.

• The core collapses, and the star’s material moves at ¼ of the speed of light feeding even more material.

• The stars then die in a supernova explosion

• This either produces a neutron star, or a black hole if the star is massive enough that all the material collapses into a singularity.

Black Hole Itself

• What we see is the event horizon, where nothing can come back once fallen inside

• Time slows down inside the black hole, as outsiders see you freeze, while you see the outside speed by.

Hawking Radiation is a theoretical process described by a physicist Stephen Hawking, and was proposed in 1974

It occurs just outside of the event horizon of a black hole due to quantum effects

Virtual particle pairs are constantly forming in space. Near the event horizon, one particle can escape whole the other falls into the black hole

The energy for Hawking radiation also leads back to Einstein's (E=mc^2), and the and the particles become real and one escapes, the mass-energy equivalence leads to a gradual decrease in the black holes mass

You can basically describe wormholes as two towns that are on opposite sides of a mountain. In order to travel faster, you just dig a hole through the mountains and you have arrived at your destination.

To be more specific, wormholes are tunnels with two distant points.

Rather than taking millions of years to travel to another galaxy, you could instead do that in a matter of hours or even minutes.

It can be referred to as a time machine of some sort.

Albert Einstein and Nathan Rosen proposed a theory that wormholes are tunnels that connect black holes to wormholes.

Wormholes are sometimes referred to as Einstein-Rosen Bridges.

The possible relation probably comes from the wormholes’ “mouths” resembling other discovered black holes.

Next Question

While the “mouths” of wormholes are what relates wormholes and black holes together, what other things make these two associated with each other?

The sun emits a hundred quintillion times more amount of energy per second than our most efficient nuclear reactor. A trillion nuke per second

Building a Dyson Sphere is like the discovery of fire in terms of the advance of species.

Transform an interplanet species, to interstellar species.

A dyson sphere should be made of a bunch of mirrors, surrounding the sun to extract energy.

If a panel is 1 km^2, we would need 30 quadrillion to surround the sun.

100 quintillion tons of materials

Materials

• Disassemble mercury.

• The use of the method listed is an exponential growth for the production of panels.

Design

• Simpler is better

• Most likely be enormous mirrors

•  Concentrates the energy in a single energy collection place.

• Light, thin.

Energy

• A few workers, a bunch of robots

• Solar collectors

  • Gives energy.

  • Deploy 1 square km of the collectors to provide energy for miners

• Miners

  • Strip mines the surface of the planet

• Refiners

  • Extract and fabricate them into the satellites.

• Launch equipment

  • Most likely rail gun, an electromagnetic track to launch things into space.

60 doubling times would be enough to surround the sun.

A Dyson sphere is a megastructure built around a star to capture its energy output. Theoretically, it could provide an advanced civilization with almost unlimited energy 

A lot of miss spread rumors go around about Dyson Spheres, making them seem mythical, but there are some more realistic types not talked about much

- Dyson Swarm: A Network of millions of solar-collecting satellites orbiting a star, working together to capture energy

-Dyson Bubble: Satellites held in place by solar sails using radiation pressure from the star to remain stable 

Freeman Dyson first popularized this idea in 1960, suggesting it could be a sign of advanced alien civilizations (Type II on the Kardashev Scale) 

Earth (a Type 0 civilization) currently gets most of its energy from fossil fuels, solar, and wind--not even close to harvesting energy on a star-level scale 

To achieve this, we’d need unimaginable amounts of resources, technology far beyond what we have now, and the ability to work in space at a massive scale

Building a Dyson Sphere would require us to become a Type I civilization first, meaning we would need to harness ALL of Earth’s available energy

Some ideas suggest building a “Dyson Swarm” (a collection of solar-collecting satellites orbiting the sun) might be a starting point..but even so, keeping the structure stable without it collapsing due to gravity would be a massive engineering challenge 

Fun Fact! Dyson Spheres have even been featured in science fiction, like Star Trek and other futuristic stories, seen as the ultimate sign of an advanced civilization.