These so-called baryon acoustic oscillations offer another yardstick for measuring the expansion rate of the universe over time and putting limits on the value of dark energy .
这些被称为重子声学振荡的东西为测量随时间变化的宇宙的膨胀速度和对暗能量的值施加限制提供另一尺码。
Brookhaven 's hooman davoudiasl and colleagues at triumf and the university of british columbia suggest that the presence of their mysterious " x " particle in the earliest moments of our universe could hold the key both to the nature of dark matter , and to baryon asymmetry .
