Wednesday, November 30, 2011
Sunday, November 20, 2011
It was over 25 years ago that the London Bridge lighting system, used to illuminate the landmark at night, was last upgraded. But GE and its UK partner EDF Energy recently received a formal approval to retrofit the 800-foot bridge with new energy efficient LED technology and a cabling system that will bring it into the 21st century with style.
Friday, November 18, 2011
Galaxies learned to "go green" early in the history of the universe, continuously recycling immense volumes of hydrogen gas and heavy elements to build successive generations of stars stretching over billions of years.This ongoing recycling keeps galaxies from emptying their "fuel tanks" and therefore stretches out their star-forming epoch to over 10 billion years. However, galaxies that ignite a rapid firestorm of star birth can blow away their remaining fuel, essentially turning off further star-birth activity....
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