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Discovery that universe is expanding faster and faster earns physics Nobel

Three astronomers will share the Nobel prize in physics, for their finding that the universe's post-Big Bang expansion is neither slowing nor retreating, but is speeding up.

Nobel Prizes winner for physics Saul Perlmutter smiles as he poses with his daughter's telescope at his home in Berkeley, Calif., Tuesday, after hearing he had won.

Paul Sakuma/AP

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The discovery that the universe is expanding at an increasing pace with each passing moment has earned a trio of astronomers the 2011 Nobel Prize in Physics.

The 1 million Swedish krona ($1.46 million US) award will be shared among Saul Perlmutter, with the Lawrence Berkeley National Laboratory and the University of California at Berkeley; Brian Schmidt, with the Australian National University; and Adam Riess, with The Johns Hopkins University and the Space Telescope Science Institute.

The award, announced Tuesday morning in Stockholm, recognizes work that represents "the biggest shakeup in the physical sciences in the last 30 years," says Phillip Schewe, a physicist and spokesman for the Joint Quantum Institute at the University of Maryland.

"It's quite a lesson in scientific humility," he says, noting that this one discovery upended the way cosmologists viewed a universe they thought they were coming to know quite well.

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