A definition of black holes

Scientists are still working to understand the equations by which black holes function.

Black hole

On the night of June 20, the ruler of Bengal confined Europeans in a prison space of only 14 by 18 feet.

A black hole is so dense that its gravitational forces are strong enough to prevent anything that comes close enough to the region known as the event horizon from escaping. When they meet, particle-antiparticle pairs can annihilate one another. Firstly, the force of gravitation would be so great that light would be unable to escape from it, the rays falling back to the star like a stone to the earth.

They are objects of extreme density, with such strong gravitational attraction that even light cannot escape from their grasp if it comes near enough. Intermediate black holes — stuck in the middle Scientists once thought black holes came in only small and large sizes, but recent research has revealed the possibility for the existence of mid-size, or intermediateblack holes IMBHs.

Although the black hole itself remains unseen, these powerful jets can be viewed from great distances. Secondly, the red shift of the spectral lines would be so great that the spectrum would be shifted out of existence.

Inside the event horizon the escape velocity i. This process was helped by the discovery of pulsars in[34] [35] which, bywere shown to be rapidly rotating neutron stars. Only a few months later, Karl Schwarzschild found a solution to the Einstein field equationswhich describes the gravitational field of a point mass and a spherical mass.

black hole

Such black holes are thought to lie at the center of pretty much every galaxy, including the Milky Way. The companion stars would A definition of black holes had the same spin orientation, so the black holes they left behind would, as well. Virtually nothing can escape from them — under classical physics, even light is trapped by a black hole.

Such bodies could form when stars in a cluster collide in a chain reaction. The interesting relationship between string theory and black holes gives rise to more types of massive giants than found under conventional classical mechanics.

Michell correctly noted that such supermassive but non-radiating bodies might be detectable through their gravitational effects on nearby visible bodies. For example, if a black hole is a member of a binary star system, matter flowing into it from its companion becomes intensely heated and then radiates X-rays copiously before entering the event horizon of the black hole and disappearing forever.

This leads to a crazy amount of gravitational force pulling on objects around it. There are two theories on how binary black holes form. Because astronomers cannot directly observe a black hole, they infer its existence from the effects of its gravitational pull.

By morning all but 23 of them had suffocated to death. Albert Einstein first predicted black holes in with his general theory of relativity.Black hole: Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape.

It can be formed by the death of a massive star wherein its core gravitationally collapses inward upon itself, compressing to a point of zero volume and infinite density called the singularity.

Black holes are extremely dense: for the Sun, which has a diameter of about 1, kilometers (, miles), to be as dense as a black hole, its entire mass would have to be squeezed down to a ball fewer than 3 kilometers (5 miles) across.

black hole n. 1. A massive star in the last phase of its evolution, in which the star collapses, creating a volume of spacetime with a gravitational field so intense that its escape velocity equals or exceeds that of light. 2. A great void; an abyss: The government created a bureaucratic black hole that swallows up individual initiative.

black hole n 1. Black holes are commonly classified according to their mass, independent of angular momentum, J. The size of a black hole, as determined by the radius of the event horizon, or Schwarzschild radius, is roughly proportional to the mass, M, through.

Black holes may solve some of the mysteries of the universe. A black hole is a place in space where gravity pulls so much that even light cannot get out. Black hole definition is - a celestial object that has a gravitational field so strong that light cannot escape it and that is believed to be created especially in the collapse of.

Black Holes: Facts, Theory & Definition Download
A definition of black holes
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