2011年1月19日 星期三

it is designed to replace

Today's conclusions also hint at another tantalizing possibility for the future: the chance to actually "see" a black hole.The 13W bulb will be made available for purchase in January for less than $30, and should led tube to use 75% less energy than the 60W incandescent bulb it is designed to replace.

"There's no direct evidence yet that black holes exist," Gebhardt says,It was the erstwhile Left Front board that first decided to modernize streetlights Air max classic on some major thoroughfares. The former member, mayor-in-council (lighting) Sushil Sharma took the initiative to install LEDs on select roads. ".The KMC top brass were divided Led strip light when an MNC approached them to adopt the latest technology for street lighting. While mayor Sovan Chatterjee welcomed the change,.Many areas of the world are simply off the grid. To bring them electricity, solar is far cheaper Led light than connecting them to the grid or building power plants. And in some places, villagers are beginning to put up solar, home by home, instead of waiting for the government to build larger solar or wind power farms.. zero,during the fall months when our trees display the fullness of their breath Led lamp taking beauty through splashes of beautifully colored leaf arrangements, bathed within a brisk, sun filled autumn afternoon air. absolutely zero observational evidence. To infer a black hole currently, we choose the 'none of above' option. This is basically because alternative explanations are increasingly being ruled out."

However, he says that the black hole in M87 is so massive that astronomers someday may be able to detect its "event horizon" - the edge of a black hole, beyond which nothing can escape. The event horizon of M87's black hole is about three times larger than the orbit of Pluto - large enough to swallow our solar system whole. (Good thing M87 is 50 million light-years away!)

Though the technology does not yet exist, M87's event horizon covers a patch of sky large enough to be imaged by future telescopes. Gebhardt says future astronomers could use a world-wide network of submillimeter telescopes to look for the shadow of the event horizon on a disk of gas that surrounds M87's black hole.

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