Seeing the Universe with Einstein’s Glasses

Michael Schirber at

A survey of 13 million galaxies and 200,000 quasars uses Einstein’s theory of gravity to confirm a dark side of the universe.

LensLight traveling billions of light years to reach us is bent by clumps of matter along its path. Albert Einstein, who is being remembered this year for his amazing scientific output from 1905, predicted this so-called gravitational lensing when he characterized gravity as the curvature of space-time.

Earlier attempts to measure the lensing of far-away quasars had failed to see an effect that matched the standard picture from cosmology – raising some doubts about the validity of that model. But an analysis of the Sloan Digital Sky Survey, released last week, puts an end to the controversy.

More here.