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Black Holes Not Black After All, Theorize Physicists 168

Posted by Unknown Lamer
from the lemon-chiffon-hole dept.
KentuckyFC (1144503) writes Black holes are singularities in spacetime formed by stars that have collapsed at the end of their lives. But while black holes are one of the best known ideas in cosmology, physicists have never been entirely comfortable with the idea that regions of the universe can become infinitely dense. Indeed, they only accept this because they can't think of any reason why it shouldn't happen. But in the last few months, just such a reason has emerged as a result of intense debate about one of cosmology's greatest problems — the information paradox. This is the fundamental tenet in quantum mechanics that all the information about a system is encoded in its wave function and this always evolves in a way that conserves information. The paradox arises when this system falls into a black hole causing the information to devolve into a single state. So information must be lost.

Earlier this year, Stephen Hawking proposed a solution. His idea is that gravitational collapse can never continue beyond the so-called event horizon of a black hole beyond which information is lost. Gravitational collapse would approach the boundary but never go beyond it. That solves the information paradox but raises another question instead: if not a black hole, then what? Now one physicist has worked out the answer. His conclusion is that the collapsed star should end up about twice the radius of a conventional black hole but would not be dense enough to trap light forever and therefore would not be black. Indeed, to all intents and purposes, it would look like a large neutron star.

Comment: For trivial programming (Score 1) 353

by just_another_sean (#47517979) Attached to: 'Just Let Me Code!'

I find Vi/G**/Make is still pretty simple. And things like SDL, GTK, QT, etc. simplify things even more. Having watched Windows development evolve for a long time I can sort of see what the submitter is saying but on the other hand anyone who ever wrote a C program for Windows in the 90's using the original Petzold books should really appreciate the frameworks available for Windows programming these days.

Again, I'm talking "Coding for fun, hobby, learning" here, just simple stuff. If it's a business app or something where the subject matter is complex than my feeling is the tools are still more helpful in overcoming that complexity than having to do everything from the bottom up.

Comment: Re:Privacy Badger (Score 3, Informative) 184

by just_another_sean (#47506787) Attached to: A New Form of Online Tracking: Canvas Fingerprinting

Yes, Privacy Badger is a great tool. It's a little tedious when loading content from CDN's, can make pages look pretty bad unless you let a little tracking in... So I also keep my privacy set to delete everything when I close the browser. I also follow the guidelines here ( Scroll down to the Web Browser section ). It's Debian specific but easily translated to whatever mozilla based browsing experience you're using.

As mentioned in the HowTo you can check your "fingerprint" here: https://panopticlick.eff.org/.

And all that said, I have no idea at the moment if any of the above defeats the technique from TFA.

Comment: Re:Missing information (Score 3, Interesting) 31

by just_another_sean (#47474953) Attached to: Pushdo Trojan Infects 11,000 Systems In 24 Hours

This is what I was wondering... AFAICT the first link is /.'ed and the second link doesn't go in to any technical details. I'm assuming Windows until I hear otherwise but the geographic mix is interesting; are these Windows XP boxes? Is the fact that the infections are concentrated in India and Asia an indication of the many people there that have not upgraded?

I'd never heard of Pushdo before this, anyone else know more about it?

Comment: Re:Trey Parker and Matt Stone could be liable... (Score 1) 83

by just_another_sean (#47469955) Attached to: Manuel Noriega Sues Activision Over Call of Duty

I'd say Trey and Matt would have lines that rival Apple fans lining up for new iStuff of people ready to sue them. But I think in their case parody and satire protects them where Activision is going for gritty and realistic.

But IANAL and all that. I really don't know what to think here; Noriega is scum but laws should apply equally to all, regardless of how much of a dick they are. I know I wouldn't want people profiting off my depiction without my permission. Lucky me, I'm a nobody and don't really have to worry about! :-)

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