The Chandra X-ray Observatory is shedding light on dark energy: To the left galaxy cluster Abell 85. To the right the growth of cosmic structure when the Universe was 0.9 billion, 3.2 billion and 13.7 billion years old (now). Credit: X-ray NASA/CXC/SAO/A.Vikhlinin et al, Optical (SDSS); Illustration (MPE/V.Springel))
In this discussion at the University of California on January 19 2012. Is dark energy really accelerating the universe? Join Andrew Fraknoi and three Berkeley Lab cosmologists as they delve into nature’s greatest mystery.