SpaceBiggest 3D galaxy map to probe dark energy's history The Sloan Digital Sky Survey has entered a new phase, probing to greater distances to study the universe's expansion history 51¶¯Âþ
SpaceFresh puzzle over dark energy supernovae The supernovae that astronomers use to measure dark energy's affect on the universe's expansion have more complex origins than we thought 51¶¯Âþ