Shining Light on Dark Energy
At this observatory high on a Chilean mountaintop, scientists spent six years surveying the night sky to better understand dark energy, the mysterious force that makes the universe expand at an ever faster rate. The stuff makes up 70 percent of the cosmos, but it’s little understood. Now for the first time, scientists with the Dark Energy Survey have been able to combine four different measurement techniques in a single experiment to verify its existence and figure out what it’s like. Already their first analyses are proving to be just as or even more precise than previous dark energy experiments.