Assertion: dark energy | /r/HasProperty | supported by independent observations
Facets:
value: soon after
type: TEMPORAL
Source sentences:
text: Soon after, dark energy was supported by independent observations: in 2000, the BOOMERanG and Maxima cosmic microwave background (CMB) experiments observed the first acoustic peak in the CMB, showing that the total (matter+energy) density is close to 100% of critical density.