A new color-coded image represents the first visual evidence of the existence of dark energy, a mysterious force that astronomers think is causing the expansion of the universe to speed up.
"This is the first time when we actually see the effect of dark energy in a picture," said study leader István Szapudi of the University of Hawaii. "This is the most direct evidence of dark energy."
The new image reveals the spectral fingerprints created by dark energy as it stretches huge supervoids and superclusters, structures that are roughly half a billion light-years across.
(Via National Geographic News.)