physics4me

An artist's conception of Gravity Probe B orbiting Earth to measure space-time.

In a tour de force of technology and just plain stubbornness spanning half a century and costing more than $750 million, a team of experimenters from Stanford University reported on Wednesday that a set of orbiting gyroscopes had detected a slight sag and an even slighter twist in space-time. The finding confirms some of the weirdest of the many strange predictions — like black holes and the expanding universe — of Albert Einstein’s theory of gravity, general relativity…..Read more: http://www.nytimes.com/2011/05/05/science/space/05gravity.html?_r=1&ref=space