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At the center of spiral galaxy M81 is a supermassive black hole about 70 million times more massive than our sun.
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A physicist presents a solution to present-day cosmic mysteries.
By:
Nikodem Poplawski, Inside Science Minds Guest Columnist
(ISM) -- Our universe may exist inside a black hole. This may sound strange, but it could actually be the best explanation of how the universe began, and what we observe today. It's a theory that has been explored over the past few decades by a small group of physicists including myself.
Successful as it is, there are notable unsolved questions with the standard big bang theory, which suggests that the universe began as a seemingly impossible "singularity," an infinitely small point containing an infinitely high concentration of matter, expanding in size to what we observe today. The theory of inflation, a super-fast expansion of space proposed in recent decades, fills in many important details, such as why slight lumps in the concentration of matter in the early universe coalesced into large celestial bodies such as galaxies and clusters of galaxies.
But these theories leave major questions unresolved. For example: What started the big bang? What caused inflation to end? What is the source of the mysterious dark energy that is apparently causing the universe to speed up its expansion?
The idea that our universe is entirely contained within a black hole provides answers to these problems and many more. It eliminates the notion of physically impossible singularities in our universe. And it draws upon two central theories in physics.
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| In this picture, spins in particles interact with spacetime and endow it with a property called "torsion." To understand torsion, imagine spacetime not as a two-dimensional canvas, but as a flexible, one-dimensional rod. Bending the rod corresponds to curving spacetime, and twisting the rod corresponds to spacetime torsion. If a rod is thin, you can bend it, but it's hard to see if it's twisted or not. |
The first is general relativity, the modern theory of gravity. It describes the universe at the largest scales. Any event in the universe occurs as a point in space and time, or spacetime. A massive object such as the Sun distorts or "curves" spacetime, like a bowling ball sitting on a canvas. The Sun's gravitational dent alters the motion of Earth and the other planets orbiting it. The sun's pull of the planets appears to us as the force of gravity.The second is quantum mechanics, which describes the universe at the smallest scales, such as the level of the atom. However, quantum mechanics and general relativity are currently separate theories; physicists have been striving to combine the two successfully into a single theory of "quantum gravity" to adequately describe important phenomena, including the behavior of subatomic particles in black holes.
A 1960s adaptation of general relativity, called the Einstein-Cartan-Sciama-Kibble theory of gravity, takes into account effects from quantum mechanics. It not only provides a step towards quantum gravity but also leads to an alternative picture of the universe. This variation of general relativity incorporates an important quantum property known as spin. Particles such as atoms and electrons possess spin, or the internal angular momentum that is analogous to a skater spinning on ice.
Spacetime torsion would only be significant, let alone noticeable, in the early universe or in black holes. In these extreme environments, spacetime torsion would manifest itself as a repulsive force that counters the attractive gravitational force coming from spacetime curvature. As in the standard version of general relativity, very massive stars end up collapsing into black holes: regions of space from which nothing, not even light, can escape.
Here is how torsion would play out in the beginning moments of our universe. Initially, the gravitational attraction from curved space would overcome torsion's repulsive forces, serving to collapse matter into smaller regions of space. But eventually torsion would become very strong and prevent matter from compressing into a point of infinite density; matter would reach a state of extremely large but finite density. As energy can be converted into mass, the immensely high gravitational energy in this extremely dense state would cause an intense production of particles, greatly increasing the mass inside the black hole.
The increasing numbers of particles with spin would result in higher levels of spacetime torsion. The repulsive torsion would stop the collapse and would create a "big bounce" like a compressed beach ball that snaps outward. The rapid recoil after such a big bounce could be what has led to our expanding universe. The result of this recoil matches observations of the universe's shape, geometry, and distribution of mass.
In turn, the torsion mechanism suggests an astonishing scenario: every black hole would produce a new, baby universe inside. If that is true, then the first matter in our universe came from somewhere else. So our own universe could be the interior of a black hole existing in another universe. Just as we cannot see what is going on inside black holes in the cosmos, any observers in the parent universe could not see what is going on in ours.
The motion of matter through the black hole's boundary, called an "event horizon," would only happen in one direction, providing a direction of time that we perceive as moving forward. The arrow of time in our universe would therefore be inherited, through torsion, from the parent universe.
Torsion could also explain the observed imbalance between matter and antimatter in the universe. Because of torsion, matter would decay into familiar electrons and quarks, and antimatter would decay into "dark matter," a mysterious invisible form of matter that appears to account for a majority of matter in the universe.
Finally, torsion could be the source of "dark energy," a mysterious form of energy that permeates all of space and increases the rate of expansion of the universe. Geometry with torsion naturally produces a "cosmological constant," a sort of added-on outward force which is the simplest way to explain dark energy. Thus, the observed accelerating expansion of the universe may end up being the strongest evidence for torsion.
Torsion therefore provides a theoretical foundation for a scenario in which the interior of every black hole becomes a new universe. It also appears as a remedy to several major problems of current theory of gravity and cosmology. Physicists still need to combine the Einstein-Cartan-Sciama-Kibble theory fully with quantum mechanics into a quantum theory of gravity. While resolving some major questions, it raises new ones of its own. For example, what do we know about the parent universe and the black hole inside which our own universe resides? How many layers of parent universes would we have? How can we test that our universe lives in a black hole?
The last question can potentially be investigated: since all stars and thus black holes rotate, our universe would have inherited the parent black hole’s axis of rotation as a "preferred direction." There is some recently reported evidence from surveys of over 15,000 galaxies that in one hemisphere of the universe more spiral galaxies are "left-handed", or rotating clockwise, while in the other hemisphere more are "right-handed", or rotating counterclockwise. In any case, I believe that including torsion in geometry of spacetime is a right step towards a successful theory of cosmology.
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Australia Prime Minister Advisor Says Global Warming is a United Nations Hoax to Create New World Order
Maurice Newman, the Australian PM's business adviser
rt.com
The Australian prime minister’s chief business adviser says that climate change is a ruse led by the United Nations to create a new world order under the agency’s control. The statement coincided with a visit from the UN’s top climate negotiator.
Maurice Newman, chairman of Prime Minister Tony Abbott’s business advisory council, said the UN is using false models which show sustained temperature increases because it wants to end democracy and impose authoritarian rule.“It’s a well-kept secret, but 95 percent of the climate models we are told prove the link between human CO2 emissions and catastrophic global warming have been found, after nearly two decades of temperature stasis, to be in error,” he wrote in an opinion piece published in The Australian newspaper on Friday, without providing evidence.
“The real agenda is concentrated political authority. Global warming is the hook,” he said, adding that the UN is against capitalism and freedom and wants to create a “new world order.”
The adviser’s inflammatory comments coincided with a visit from UN climate chief Christiana Figueres.
According to Newman, Figueres is “on record saying democracy is a poor political system for fighting global warming. Communist China, she says, is the best model.”
Figueres was in Australia to discuss practical climate change action, urging the country to move away from heavily polluting coal production. She also urged Australia to play a leading role at the climate summit in Paris in December.
But that call is unlikely to be heeded. During November’s G20 meeting in Brisbane, Abbott warned that the Paris summit would fail if world leaders decided prioritize the cutting of carbon emissions over economic growth.
Abbott, who called the science behind climate change “crap” in 2009, also repealed a tax on carbon pricing and abolished the independent Climate Commission advisory body in Australia.
The prime minister has been reluctant to take part in climate change politics, trying but failing to keep it off the agenda at last year’s G20 summit.
Both Abbott’s office and the United Nations have so far declined to comment on Newman’s statements.
A well-known climate change skeptic, Newman has made similar provocative comments in the past, calling the notion a “myth” and a “delusion.”
In February, he criticized renewable energy policies. Citing British charity Age UK, he stated that elderly citizens in Britain often die of “winter deaths” because they can’t afford power. He blamed renewable energy policies which drive up the price of energy.
However, when asked about his claim by The Guardian, the charity sent back a statement which referenced high energy costs, but failed to mention anything about renewable energy.
Just a few months earlier, in November 2014, Newman cited a Scottish government-commissioned study which allegedly said that for every job in the renewable sector, 3.7 jobs were lost elsewhere.
However, the report itself made no mention that it was commissioned by the government. In fact, the government called the study “misleading,” adding that the industry would actually have the opposite effect on jobs.
According to the UN’s Intergovernmental Panel on Climate Change, the global mean temperature could rise by up to 4.8° Celsius (40.6° Fahrenheit) this century alone. The prediction is seen as a recipe for droughts, floods and rising seas.