Is a black hole made of matter or energy?

Don’t let the name fool you: a black hole is anything but empty space. Rather, it is a great amount of matter packed into a very small area – think of a star ten times more massive than the Sun squeezed into a sphere approximately the diameter of New York City.

What is the state of matter in a black hole?

Originally Answered: What state of matter is a black hole? A black hole is no more made of matter than is the gravitational field of the Earth. A black hole is a region of spacetime. It’s mass does not come from matter but from the curvature of spacetime itself.

Why is it impossible for any matter to escape from a black hole?

A black hole is a region of spacetime where gravity is so strong that nothing — no particles or even electromagnetic radiation such as light — can escape from it. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe directly.

How does dark matter affect the universe?

The even distribution means that dark energy does not have any local gravitational effects, but rather a global effect on the universe as a whole. This leads to a repulsive force, which tends to accelerate the expansion of the universe.

Does a black hole violate the law of Conservation of energy?

The black hole’s gravitational field increases a little because you increased its mass-energy by one kilogram. No, it does not. If it did, then it would not curve spacetime and it would not be a black hole. Yes, a black hole can violate conservation of energy.

Is dark matter made up of large numbers of black holes?

But whether or not this population could be large enough to constitute the dark matter is still under debate. Recent calculations have shown that if dark matter were made up of black holes weighing between 10 and 300 solar masses, then LIGO should have detected hundreds more mergers in its first run [ 3 ].

How do we know dark matter exists?

To account for the dark matter, cosmologists need a separate population of black holes that formed long before stars. Such “primordial” black holes were first proposed decades ago, but they never garnered a lot of interest, as no hints of their existence were found.

Are black holes from hybrid inflation dark matter?

Michael Schirber is a Corresponding Editor for Physics based in Lyon, France. S. Clesse and J. García-Bellido, “Massive primordial black holes from hybrid inflation as dark matter and the seeds of galaxies,” Phys. Rev. D 92, 123523 (2015).