How much has the universe expanded and how quickly ? A pair of new analysis yields the most precise answer to that dubiousness we ’ve ever had .
So , how much is the universe elaborate ? 10.8 billion year ago , the universe extend at arate of 1 % every44 million years . Or , to put it another style , its elaboration outwards measures at 68 km / 2nd per million light eld at red shift 2.34 , with an accuracy of 2.2 % .
Just what does that all mean ? Andreu Font - Ribera , a physicist with Lawrence Berkeley National Laboratory who lead one of the study , explains :
This means if we look back to the universe when it was less than a one-fourth of its present years , we ’d see that a pair of coltsfoot separated by a million light years would be drifting apart at a velocity of 68 kilometre a second as the world flourish . The dubiousness is plus or minus only a km and a one-half per second .
The resolution of the studies — one from Timothée Delubac of the Centre de Saclay and the other from Font - Ribera of the Lawrence Berkeley National Laboratory — were present were presented at today ’s American Physical Society meeting . Both of the studies looked at data from the Baryon Oscillation Spectroscopic Survey ( which go by the apt byname BOSS ) , using a combination of 150,000 distant quasars and maps of how gas clouds were position around them .
Image : Artist ’s conception of BOSS taking measurements from distant quasars / Lawrence Berkeley National Laboratory
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