... Tonight's Sky . ... Sky this Month . ... space physics . ... Sky this Week . ... Astronomy for Kids . ... Scientists model physics of a key dark-energy probe . ... Ohio State University (OSU) researchers are leveraging powerful supercomputers to investigate one of the key observational probes of т??dark energy,т?? the mysterious energy form that is causing the expansion of the universe to accelerate over time. ... Only registered members of Astronomy.com are allowed to comment on this article. ...