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Space

Astronomers Discover 33 Pairs of Waltzing Black Holes 101

Posted by ScuttleMonkey from the teach-them-to-foxtrot dept.
Astronomers from UC Berkeley have identified 33 pairs of waltzing black holes, closing the gap somewhat between the observed population of super-massive black hole pairs and what had been predicted by theory. "Astronomical observations have shown that 1) nearly every galaxy has a central super-massive black hole (with a mass of a million to a billion times the mass of the Sun), and 2) galaxies commonly collide and merge to form new, more massive galaxies. As a consequence of these two observations, a merger between two galaxies should bring two super-massive black holes to the new, more massive galaxy formed from the merger. The two black holes gradually in-spiral toward the center of this galaxy, engaging in a gravitational tug-of-war with the surrounding stars. The result is a black hole dance, choreographed by Newton himself. Such a dance is expected to occur in our own Milky Way Galaxy in about 3 billion years, when it collides with the Andromeda Galaxy."
Space

Herschel Spectroscopy of Future Supernova 21

Posted by Soulskill from the that's-a-big-star dept.
davecl writes "ESA's Herschel Space Telescope has released its first spectroscopic results. These include observations of VYCMa, a star 50 times as massive as the sun and soon to become a supernova, as well as a nearby galaxy, more distant colliding starburst galaxies and a comet in our own solar system. The spectra show more lines than have ever been seen in these objects in the far-infrared and will allow astronomers to work out the detailed chemistry and physics behind star and planet formation as well as the last stages of stellar evolution before VYCMa's eventual collapse into a supernova. More coverage is available at the Herschel Mission Blog, which I run."
Businesses

What the iPod Tells Us About the World Economy 380

Posted by Soulskill from the we-look-for-things-that-make-us-go dept.
Hugh Pickens writes "Edmund Conway has an interesting article in the Telegraph where he analyzes where the money goes when you buy a complex electronic device marked 'Made in China,' and why a developed economy doesn't need a trade surplus in order to survive. For his example, Conway chooses a 30GB video iPod 'manufactured' in China in 2006. Each iPod, sold in the US for $299, provides China with an export value of about $150, but as it turns out, Chinese producers really only 'earned' around $4 on each unit. 'China, you see, is really just the place where most of the other components that go inside the iPod are shipped and assembled.' Conway says that when you work out the overall US balance of payments, it shows that most of the cash for high tech inventions has flowed back to the United States as a direct result of the intellectual property companies own in their products. 'While the iPod is manufactured offshore and has a global roster of suppliers, the greatest benefits from this innovation go to Apple, an American company, with predominantly American employees and stockholders who reap the benefits,' writes Conway. 'As long as the US market remains dynamic, with innovative firms and risk-taking entrepreneurs, global innovation should continue to create value for American investors and well-paid jobs for knowledge workers. But if those companies get complacent or lose focus, there are plenty of foreign competitors ready to take their places.'"
Operating Systems

OpenSolaris Or FreeBSD? 405

Posted by Soulskill from the ten-paces-and-turn dept.
Norsefire writes "I am in quite a predicament. I decided a while back to branch out and use a new operating system (currently running Debian). After a bit of searching (trying Gentoo, Gobo and Arch along the way), I decided to use something that isn't Linux. Long story short: I narrowed the choices down to OpenSolaris and FreeBSD, but now I'm stuck. OpenSolaris is commercially backed by Sun, has nice enterprise-y tools in the default install, and best of all, a mature implementation of ZFS. FreeBSD is backed by a foundation, has a minimal default install and a rather new (but recently improved in the 8.0 release) implementation of ZFS, however it offers the Ports Collection (I quite like the performance boost due to compiling from source, no matter how small it might be) and a bigger community than OpenSolaris. That is just a minimal mention of the differences. I would be interested to see what the Slashdot community thinks of these two operating systems."
The Internet

Searching Google, Where Internet Access is Scarce 130

Posted by timothy from the guessing-isn't-quite-a-substitute dept.
Internet searching means that finding information mundane, obscure, or fantastically useful is just a few keystrokes away — but not if you're without a connection to the Internet (or can't read), both the norm for many of the world's poor. itwbennett writes "Rose Shuman developed a contraption for this under-served population called Question Box that is essentially a one-step-removed Internet search: 'A villager presses a call button on a physical intercom device, located in their village, which connects them to a trained operator in a nearby town who's sitting in front of a computer attached to the Internet. A question is asked. While the questioner holds, the operator looks up the answer on the Internet and reads it back. All questions and answers are logged. For the villager there is no keyboard to deal with. No complex technology. No literacy issues.' This week, Jon Gosier, of Appfrica, launched a web site called World Wants to Know that displays the QuestionBox questions being asked in real time. As Jon put it, it's allowing 'searching where Google can't.' And providing remarkable insight into the real information needs of off-the-grid populations."

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Everything that can be invented has been invented. -- Charles Duell, Director of U.S. Patent Office, 1899

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