August 30, 2005
Lawrence Berkeley National Laboratory
Physics models of dark energy can be separated into distinct scenarios, which could be used to rule out Einstein's cosmological constant and distinguish among two major classes of dynamic quintessence, a thawing model and a freezing model. Which scenario makes the best fit can be tested with the Joint Dark Energy Mission (JDEM) proposed by NASA and the U.S. Department of Energy.
The SuperNova/Acceleration Probe, SNAP, is a satellite designed to study dark energy through the discovery and precision measurement of thousands of distant supernovae.
Credit: Image courtesy of DOE/Lawrence Berkeley National Laboratory
What is the mysterious dark energy that's causing the expansion of the universe to accelerate? Is it some form of Einstein's famous cosmological constant, or is it an exotic repulsive force, dubbed "quintessence," that could make up as much as three-quarters of the cosmos? Scientists from Lawrence Berkeley National Laboratory (Berkeley Lab) and Dartmouth College believe there is a way to find out.
The above story is based on materials provided by Lawrence Berkeley National Laboratory. Note: Materials may be edited for content and length.
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Lawrence Berkeley National Laboratory. "Finding A Way To Test For Dark Energy." ScienceDaily. ScienceDaily, 30 August 2005. <www.sciencedaily.com/releases/2005/08/050830070323.htm>.
Lawrence Berkeley National Laboratory. (2005, August 30). Finding A Way To Test For Dark Energy. ScienceDaily. Retrieved April 19, 2014 from www.sciencedaily.com/releases/2005/08/050830070323.htm
Lawrence Berkeley National Laboratory. "Finding A Way To Test For Dark Energy." ScienceDaily. www.sciencedaily.com/releases/2005/08/050830070323.htm (accessed April 19, 2014).