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Astrophysics



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3Vote!

New Quantum Gravity Theory

Scientific American: Splitting Time from Space—New Quantum Theory Topples Einstein's Spacetime Physicists have struggled to marry quantum mechanics with gravity for decades. In contrast, the other forces of nature have obediently fallen into line. For instance, the electromagnetic force can be described quantum-mechanically by the motion of photons. Try and work out the gravitational force between...

3Vote!

New Theory of Gravity Decouples Space & Time

eldavojohn writes "Petr Horava, a physicist at the University of California in Berkeley, has a new theory about gravity and spacetime. At high energies, it actually snips any ties between space and time, yet at low energies devolves to equivalence with the theory of General Relativity, which binds them together. The theory is gaining popularity with physicists because it fits some observations...

3Vote!

Quantum Loop Gravity

What is Quantum Loop Gravity? The Quick and Dirty: A Theory of spacetime Leading proponents include: Lee Smolin, Carlo Rovelli, John Baez, Roger Penrose and Abhay Ashtekar Alternative to string theory - views space space as made up of discrete (quantised) loops that mesh together Loops are spin networks of gravitational fields that have been energized. In short: It is a quantum theory of Gravity. It...

3Vote!

Surfer dude's theory of everything: the magic of Garrett Lisi

The Big Idea: Roger Highfield explains why Garrett Lisi, the surfer who drew up a 'theory of everything' to explain the universe, is a great role model for science. Of all the stories I've written in recent years, the most popular by far bore the intriguing headline: " Surfer dude stuns physicists with theory of everything ." It described how an American, Garrett Lisi, had unveiled a new...

3Vote!

The Big Bang Theory Season 3 Episode 7 S03E07 "The Guitarist Amplification"

The Big Bang Theory : The tv series presents its latest Dancing with the Stars Season 3 Episode 7 "The Guitarist Amplification" is realese on 9 November 2009.TV Series : "The Big Bang Theory" Director : Mark CendrowskiWritter : Jim ReynoldsStarring : Johnny Galecki, Jim Parsons, Kaley Cuoco, Kunal Nayyar, Simon HelbergGenre : ComedyAir Date : 9 November 2009 More Info : IMDB, TV.COMThe...

3Vote!

IIST recruitment of Faculty – Professors, Associate Professors & Assistant Professors | November 2009

Indian Institute of Space Science and Technology [A deemed to be University under Sec.3 of the UGC Act 1956] Government of India, Department of Space Thiruvananthapuram -695022 Applications are invited for the following posts Job Details 1. Professor Pay Scale : PB-4 Rs. 37400-67000, Grade Pay Rs. 8,900/- Age : 45 years Area of Specialisation : 1. Flight Dynamics, Aerospace Systems Design 2. Networks,...

7Vote!

The Big Bang Theory - Episode 3.07 - The Guitarist Amplification - Promo

Source: TV Spoilers Center Stay up to date even quicker by following us on Twitter

4Vote!

How many Multiverses are there?

by Amanda Gefter - New Scientist HOW many universes are there? Cosmologists Andrei Linde and Vitaly Vanchurin at Stanford University in California calculate that the number dwarfs the 10 Exp 500 universes postulated in string theory, and raise the provocative notion that the answer may depend on the human brain. The idea that there is more than one universe, each with its own laws of physics, arises...

3Vote!

New Attempt for a 'Unified Theory of Everything'

When it comes to explaining the world around us, there are two ways you can go about it. You can either explain how large bodies interact, as in everything from apples and humans to planets and galaxies, or determine the behavior of extremely small, elementary particles, such as photons and electrons. General relativity, as a theory, is extremely apt at explaining large-scale interactions, whereas...

8Vote!

The Big Bang Theory - Episode 3.08 - The Adhesive Duck Deficiency - Press Release

SHELDON MUST COME TO PENNY'S RESCUE, ON "THE BIG BANG THEORY," MONDAY, NOV. 16 "The Adhesive Duck Deficiency" - With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on, on THE BIG BANG THEORY, Monday, Nov. 16 (9:30-10:00 PM, ET/PT) on the CBS Television Network. SERIES REGULARS: Leonard................................... Johnny Galecki...

7Vote!

The Big Bang Theory - Episode 3.07 - The Guitarist Amplification - Promotional Photos

"The Guitarist Amplification" - An argument between Leonard and Penny proves "inconvenient" to Sheldon, on THE BIG BANG THEORY, Monday, Nov. 9 (9:30-10:00 PM, ET/PT) on the CBS Television Network. Source: CBS Stay up to date even quicker by following us on Twitter

3Vote!

Cosmological Hawking Radiation, and the failure of Einstein's General Theory

Cosmological horizons are rather arbitrary. The cosmological limit to direct observation is at different places for different observers, and if you change position, your horizon position changes to match. In that respect, a cosmological horizon is a little bit like a planetary horizon - it's different for everyone, and every physical location can be considered as being at a horizon boundary for someone...

3Vote!

57 Channels and Only This Is On vol. CIII

Tool Academy : Charm has become this season’s Shawn who inexplicably manages to make it one more week even though he was one of the biggest tools from week one. You can stream recent episodes over at vh1.com . You can also download Tool Academy on iTunes . Greek : Oh crap, they really are going to reignite the Cappie / Casey / Evan love triangle. Hopefully they graduate and all that happens off...

3Vote!

String theory (!) and "bad metals"

I saw a remarkable talk today by Hong Liu from MIT, about quantum gravity and what it has to say about high temperature superconductivity. Yes, you read that correctly. It was (at least for a nonexpert) a reasonably accessible look at a genuinely useful physics result to come from string theory. I doubt I can do it justice, so I'll just give the bare-bones idea. Within string theory, Maldacena (and...

3Vote!

57 Channels and Only This Is On vol. CII

Tool Academy : There is something to be said that when it was announced that the winning team would get a conjugal visit, Shannon and her “Special” Tool were the only ones not celebrating. So not surprising that they got eliminated. But I was really shocked that she took him back. I wonder if there is something seriously wrong with Shannon that we didn’t see because she should be...