As the study’s lead author Zhan Feng Mai tells Live Science, physicists know that energy can be stored in and extracted from a black hole, which at its most basic sounds like a functioning battery. But this is unlike any battery you’ve ever seen. To create a black hole battery, you would first need a positive charge

Yes, physicists know that energy can be stored in and extracted from a black hole. Black holes can store rotational energy and have enormous amounts of energy available to be tapped. 

Here are some ways to extract energy from black holes: 

• Reconnection of magnetic field lines A Columbia study indicates that energy can be extracted from black holes through reconnection of magnetic field lines. 
• Harvesting charged plasma particles A study by researchers from Columbia University and Universidad Adolfo Ibanez in Chile suggests that energy can be extracted from black holes by harvesting charged plasma particles escaping from the event horizon. 
• Penrose process If the black hole is rotating, it is possible to extract energy from it using a mechanism known as Penrose process. 

To create a black hole battery, you would first need a positive charge

Black holes are a prediction of Einstein’s theory of general relativity. The theory predicts that a compact mass can deform spacetime to form a black hole. Black holes are objects with such strong gravitational fields that nothing can escape their pull. The boundary where the velocity needed to escape exceeds the speed of light is called the event horizon

A new theory suggests that supermassive black holes at the centers of galaxies may be the source of dark energy. Dark energy is the mysterious force that drives the accelerating expansion of the universe. The theory is based on studying 9 billion years of black hole evolution. The growth rate of these black holes aligns with the phenomenon predicted by Einstein’s theory of gravity

Magnetic reconnection is a process that occurs when oppositely directed magnetic field lines break and reconnect in a plasma. This process converts magnetic field energy into plasma kinetic and thermal energy

Magnetic reconnection occurs when: 

• Two sets of magnetic field lines collide 
• The field lines cross and form an X 
• The field lines break and reconnect 
• The newly reconnected field lines accelerate the plasma away from the X-line 

Magnetic reconnection is a fundamental plasma phenomenon that happens all the time in astrophysical plasmas. It’s also a key process in our solar system. Some examples of magnetic reconnection include: 

• Reverse reconnection: Causes sunward convection in the Earth’s ionosphere 
• Dayside reconnection: Allows the transmission of particles and energy into the Earth’s vicinity 
• Tail reconnection: Causes auroral substorms by injecting particles deep into the

Black holes are some of the most powerful objects in the universe — and humans could devise ways to harness that power as an energy source, a new theoretical study claims

The gravitational pull from black holes is so strong that nothing can escape its grasp. So could we ever harness the gargantuan power of black holes as a source of energy

In a new study, scientists propose two ways to use black holes as energy sources someday. They predicted processes for extracting energy from black holes by using their rotational and gravitational properties.

“We know that we can extract energies from black holes, and we also know that we can inject energy into them, which almost sounds like a battery,” lead author Zhan Feng Mai, a postdoctoral researcher at the Kavli Institute for Astronomy and Astrophysics at Peking University, told Live Science.

According to some physicists, black holes could be used as batteries in the future. Here are some ways that black holes could be used as batteries: 

• Injecting charged particles By injecting electrically charged particles into a black hole, a static electric field could be generated. This could potentially convert up to a quarter of the black hole’s mass into electrical energy. 
• Harvesting energy from particles Particles falling into a black hole’s ergosphere could be sped up so fast that they break in two. One part would go into the black hole and the other would shoot out with more energy. 
• Extracting energy from Schwinger pairs Schwinger pairs are paired particles that form spontaneously in the presence of an electric field. Energy could be extracted from these particles.

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