In Brief: Study backs Einstein notion on expanding universe

Nov 24, 2010 By MALCOLM RITTER , AP Science Writer

Scientists have found new evidence that an idea Albert Einstein regretted ever having may be key to solving a big mystery: why the universe is expanding at an ever-faster clip.

That idea is the cosmological constant, sort of a repelling influence in empty space. Einstein inserted it in his in 1917. He later called it the biggest blunder of his life. But today, many scientists believe it explains the ever-faster expansion of the universe.

In Thursday's issue of the journal Nature, French researchers report analyzing observations of pairs of distant galaxies. Their results fit with the idea that the is driving the expansion. But cosmologist Michael Turner of the University of Chicago said still more work is needed to confirm that idea.

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More information: Christian Marinoni & Adeline Buzzi (2010) A geometric measure of dark energy with pairs of galaxies, Nature 468, 539-541 (25 November 2010) doi:10.1038/nature09577

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KwasniczJ
2.3 / 5 (3) Nov 24, 2010
.their results fit with the idea that the cosmological constant is driving the expansion...
I didn't get the high-level logic of this article. The cosmological constant was determined by thorough red shift analysis of thousands of galaxies. A) The single pair of galaxies proves anything in this connection. B) The numerical value of cosmological constant is actually computed from accelerated expansion of galaxies - so it will always agree with it in the same way, like the mass of dark matter will always fit the general relativity, because it's derived from gravitational lensing.

http://www.physor...655.html

In another words, I'm smelling the circular reasoning again...

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