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★ Black Hole

Black Hole & Super-Massive Black Hole: see Science & Space & Universe & Sun & Supernova & Star & Quasar & Astronomy & Cosmology & Hologram & Galaxy & White Hole & Wormhole

BBC Horizon - Stephen Hawking TV - The Raw Story online - Leonard Susskind - Michio Kaku - Neil Turok - Sandra Faber - Lawrence Krauss - Douglas Leonard - Ramesh Narayan - John Hutchison - Carl Sagan - Kip Thorne - Universe TV - The Universe TV - Decoding the Past TV - Unfolding Universe TV - Journey to the Edge of the Universe TV - Time Travel: The Truth TV - Death of the Universe TV - How The Universe Works TV - Seven Ages of Starlight TV - Morgan Freeman TV - Neil deGrasse Tyson - Brian Greene - Michelle Thaller - Red Dwarf TV - Star Trek: Voyager TV - James Burke TV - Cosmic Monsters TV - How to See a Black Hole TV - Nova: Black Hole Apocalypse TV - 

 

 

3,299.  Perhaps instead they [black holes] might be found in the centres of galaxies.  Horizon: Here Be Monsters, 1993

 

 

3,300.  In March 2000 two astronomers made an extraordinary discovery.  One that is set to overturn our understanding of how the universe formed.  What they discovered was a very simple relationship – a relationship between the galaxy we live in and the most destructive force in the universe – a super-massive black hole; it set the world of cosmology alight.  (Black Hole & Universe & Space & Cosmology & Astronomy & Galaxy)  BBC Horizon: Super-Massive Black Holes 2000

 

3,301.  Super-massive black holes could exist in two states: when it’s feeding, a giant black hole creates a bright burning gas disk around it.  And then for some reason it stops feeding, leaving a dark deadly core lurking menacingly in the centre of the galaxy.  (Black Hole & Universe & Space & Cosmology & Astronomy & Galaxy)  ibid.

 

3,302.  Perhaps black holes are an essential part of what galaxies are and how they work.  (Black Hole & Universe & Space & Cosmology & Astronomy & Galaxy)  ibid.

 

3,303.  The size of the black hole in the end depends on how fast the stars are moving in the newly formed galaxy around it ... All giant black holes and their galaxies are connected from birth.  (Black Hole & Universe & Space & Cosmology & Astronomy & Galaxy & Stars)  ibid.

 

3,304.  If our black hole has started feeding again, could this affect the Earth?  (Black Hole & Universe & Space & Cosmology & Astronomy & Galaxy)  ibid.

 

 

3,305.  Every time we see a gamma-ray burst we are witnessing the death cry of a massive star and the birth of a black hole.  (Black Hole & Gamma Ray Burst)  Horizon: The Death Star 2001

 

 

2,511.  What if the world is so strange we could never hope to understand it.  And science was wasting its time trying to do so.  It sounds like the sort of thing a mystic might say.  But this was a suggestion made three decades ago by the most famous scientist in the world - Stephen Hawking.  (Science & Black Hole)  Horizon: The Hawking Paradox 2005

 

2,512.  After thirty years of debate Stephen Hawking’s legacy is being called into question as never before.  This is the story of his most controversial theory and perhaps his greatest mistake.  (Science & Black Hole)  ibid.

 

2,513.  The doubts about Hawking have recently crystalised around an idea he proposed over thirty years ago.  He called it the Information Paradox.  It is an idea that has provoked one of the great intellectual battles of recent times.  Between the most famous scientist in the world and those deter- -mined to prove him wrong.  (Science & Black Hole)  ibid.

 

2,514.  Bits of the universe were disappearing ... Hawking was saying that a black hole would eventually disappear.  (Science & Black Hole)  ibid.

 

2,515.  The Information Paradox, according to Susskind, was solved.  Now across the world physicists raced to confirm it.  Finally after ten years and hundreds of attempts a paper emerged that vindicated Susskind.  (Science & Black Hole)  ibid.

 

2,516.  Hawking’s speech turned out to be one of the great U-turns of science.  For information he now admitted was not lost in black holes after all.  The idea he had defended for thirty years had been wrong all along.  ibid. 

 

 

3,306.  It now appears that there is a super-massive black hole at the centre of almost every galaxy.  And it could be that these black holes aren’t simply agents of destruction because scientists have discovered a unique relationship they share with their parent galaxy.  (Black Hole & Galaxy)  Horizon: Whos Afraid of a Big Black Hole? 2009

 

 

3,307.  Black holes are the most terrifying places in the universe.  Created when a giant star dies, at their hearts is a point of infinite gravity so powerful nothing can escape it, not even light.  (Black Hole & Star & Gravity & Light)  Horizon: What is Reality? 2011

 

3,308.  Hawking’s revelation was that black holes instead of lasting for ever as everyone thought eventually disappear.  Leaving no trace of anything.  Including what Physics consider a fundamental part of reality: information .... Information can never be destroyed.  (Black Hole & Information)  ibid.  

 

3,309.  Lenny [Susskind] realised that if black holes were like holograms, then there is only one place where their information can be stored: the Event Horizon.  Which would mean it would never fall in, and it would never be destroyed.  (Black Hole & Information & Hologram)  ibid.  

 

 

3,310.  Perhaps the strangest of all are black holes.  They are an exit place from the universe.  Horizon: Swallowed by a Black Hole, BBC 2013

 

3,311.  How something so small could be so bright.  What could possibly produce such a mind-bending source of power?  ibid.

 

3,312.  Lynden-Bell: inside the centre of every large galaxy in the universe lurks a super-massive black hole.  ibid.

 

3,313.  A feeding black hole is anything but black.  ibid.

 

3,314.  Quasars are nothing less than feeding, super-massive black holes.  (Black Hole & Quasar)  ibid.

 

 

2,753.  Penrose had shown the bits of the universe could be sucked into a singularity, a tiny plughole at the centre of a black hole.  Hawking took Penrose’s equations and reversed them, like running a film backwards.  Where Penrose showed the universe disappearing into a black hole, Hawkins showed it came from one.  (Universe & Black Hole)  Stephen Hawking, Master of the Universe

 

3,326.  Hawking knew that every object in the universe could be heated up or cooled down.  But black holes were different.  Heat would never get out of a black hole it seemed.  This started to niggle Hawking.  But it would turn out to be the key to the mystery of creation ... But what Hawking had glimpsed was a point where the two [theories] must clash: at the very edge of a black hole.  (Black Hole & Heat & Theory)  ibid.  

 

3,327.  Hawking asked, What would happen if this pair of particles bumped up against a black hole?  Hawking realised that the positive particle would have just enough energy to escape the black hole, but the particle with negative mass would fall in ... They decrease the mass of the black hole.  (Black Hole & Particle)  ibid. 

 

3,328.  Black holes now seem to be where it all happens.  They’re the engines that rip up the cosmos and create new stars and jets of energy and matter.  ibid.

 

 

3,472.  [Roger] Penrose’s theorem had shown that any collapsing star must end in a singularity.  (Star & Gravity & Black Hole)  Stephen Hawking, A Brief History of Time p56

 

96,073.  There was, however, a different interpretation of [Werner] Israel’s result, which was advocated by Roger Penrose and John Wheeler in particular.  They argued that the rapid movements involved in a star’s collapse would mean that the gravitational waves it gave off would make it ever more spherical.  According to this view, any non-rotating star, however complicated its shape and internal structure, would end up after gravitational collapse as a perfectly spherical black hole, whose size would depend only on its mass.  Further calculations supported this view, and it soon came to be adopted generally.  ibid.  pp100-101  

 

96,074.  These ‘Kerr’ black holes rotate at a constant rate, their size and shape depending only on their mass and rate of rotation.  If the rotation is zero, the black hole is perfectly round and the solution is identical to the Schwarzschild solution.  If the rotation is non-zero, the black hole bulges outward near its equator.  ibid.  p101  

 

96,075.  This non-decreasing property of the event horizon’s area placed an important restriction on the possible behaviour of black holes.  ibid.  p111

 

96,082.  A black hole ought to emit particles and radiation as if it were a hot body with a temperature that depends only on the black hole’s mass: the higher the mass, the lower the temperature.  ibid.  p115

 

96,083.  The existence of radiation from black holes seems to imply that gravitational collapse is not as final and irreversible as we once thought.  If an astronaut falls into a black hole, its mass will increase, but eventually the energy equivalent of that extra mass will be returned to the universe in the form of radiation.  ibid.  p124

 

 

3,204.  According to the Big Bang theory all the universe suddenly sprang from a point of nothing.  Could black holes be the key to explain how this happened? ... Instead of sucking everything in, a reverse black hole explodes out in a shower of Space, Matter and Time.  Exactly as the Big Bang theory predicts.  (Big Bang & Black Hole & White Hole)  Professor Stephen Hawking

 

 

3,322.  A black hole by definition is a place where gravity is so great it engulfs everything around it.  (Black Hole & Gravity)  Stephen Hawking’s Universe: Black Holes & Beyond

 

3,323.  Wheeler had another agenda in embracing the unlikely premise of black holes.  Quasars had become a nagging mystery.  Could it be he wondered that one phenomenon could explain another?  (Black Hole & Quasar)  ibid.

 

3,209.  Both the Big Bang and black holes will contain singularities, places where Space and Time come to an end and the laws of physics break down.  Black holes it seems are cauldrons of staggering energy.  In black holes they can consume everything in their path.  (Big Bang & Black Hole).  ibid.

 

3,324.  Particles can travel faster than light and can escape from a black hole.  Other people call this Hawking Radiation.  (Black Hole & Particle)  ibid.

 

 

3,325.  The negative particle is pulled into the black hole.  But the positive particle has just enough energy to avoid getting sucked in.  It is released as a particle of radiation.  (Black Hole & Particle)  Professor Stephen Hawking

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