Abstract:What is dark energy? No‐one really knows. Cosmologists around the world are tackling the problem through data collection, modelling and theory. Now a group of researchers from 19 international institutions has set a statistical challenge for colleagues from other disciplines, based on gravitational lensing: can you disentangle the various distortions in an astronomical image to isolate the dark energy contribution? And can you do so by 30 April 2009?
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