The existence of black holes and the universe

Can you hear me. So he gets into a space probe, and dives into the black hole. Michell suggested that there might be a large number of stars like this. How then could gravity slow down light, and make it fall back.

The existence of black holes and the universe

Evidence for a Spinning Black Hole. Studies of the bright light emitted by the swirling gas frequently indicate not only that a black hole is present, but also likely attributes. The gas surrounding GRO J, for example, has been found to display an unusual flickering at a rate of times a second. Given a previous mass estimate for the central object of seven times the mass of our Sun, the rate of the fast flickering can be explained by a black hole that is rotating very rapidly.

What physical mechanisms actually cause the flickering — and a slower quasi-periodic oscillation QPO — in accretion disks surrounding black holes and neutron stars remains a topic of much research. The baaing starts up at a volume low enough to permit stronger-minded animals to think for themselves without too much trouble.

This situation is pure heaven for the crowd of mathematical theorists who have hijacked physics from the natural philosophers and experimentalists. The result can be — and generally is — science fiction.

University libraries and popular science magazines are full of it at the start of this new millennium.

A hole in the theory

The eminent theoretical physicist Paul Dirac exemplifies the mathematical theorist. Are we in danger of losing the plot?

Unfortunately the subjective beauty of an equation gives no clue to the objective correctness of any physical meaning it may have. If mathematics is an art, where are the art critics?

The existence of black holes and the universe

After all, it is they who are responsible for discerning the relationships between artistic expression and experiential reality. So very small and powerful sources of radiation in deep space require almost infinite concentrations of mass to provide the gravitational force to drive them. The mathematics says so, so it must be true.

But it is equivalent to the schoolboy howler of dividing by zero. A near infinite concentration of mass involves speculative physics that cannot be tested in the laboratory.

Taken to its extreme — the black hole, which swallows even light — such a concentration swallows commonsense as well. Even Eddington, who produced the gravitational model of stars that inspired Chandrasekhar who originated the black hole ideacould not swallow it.

In this situation, of course, guesswork has free reign. Research becomes purely theoretical, engaged in adjusting sacrosanct theory to accommodate anomalous findings, not experimental, seeking to discover patterns of order in the phenomena.

And modern computing power encourages playing with theoretical models. But the success of this approach relies on the correct choice of physical model.

The most stringent requirement of the model is that it suggest tests and successfully predict the outcomes.

Stellar black holes — small but deadly

Also it is preferable to have one or more different models that are subject to falsification by observations. The black hole model fulfils neither of these criteria. It is a solitary, non-predictive model that has difficulty even explaining the jets emitted by black holes.

And as if to parody a parody, the black hole has been variously described as black, white, or even pink.

And no investigative reporter has called attention to the fact that the emperors of science have no clothes. It amplifies the hollow ring of the claim that science is logical and self-correcting.

Their amateur deliberations often result in crucial groundbreaking developments. Many of the laws of science can be credited to these people, also the foundation of new disciplines.

This select band has had ideas which were truly new, momentous in the history of science. Some are not all that well known, having just the single claim to fame but others are polymaths of astonishing intellectual calibre.Sep 25,  · Brian Koberlein.

It seems to me that what she’s developing is a possible test for the Hawking firewall. If, for example, we observed sub-solar mass black holes, or saw some signature within supernovae explosions, that might be indication of a backreaction effect.

Black holes are some of the strangest and most mysterious objects in the universe. Billions of them may exist in the Milky Way alone. But what, exactly, is a black hole? Far from earth, two black holes orbit around each other, propagating waves that bend time and space.

The existence of such waves—gravitational waves—was first predicted by Albert Einstein over. The strictest limits yet on the size of extra dimensions come from the fact that black holes haven't destroyed the universe.

The universe’s continued existence implies extra dimensions are tiny. In our three-dimensional universe, black holes have two-dimensional event horizons -- that is, they are surrounded by a two-dimensional boundary that marks the "point of no return.".

The relationship between black holes and galaxies L ike discovering a neighborhood house assumed to be vacant is actually inhabited, over the past decade researchers realized that most galaxies have at least one black hole in residence in their central regions.

But these black holes aren't the stellar variety with three to ten times the .

Black hole - Wikipedia