Quirks and Quarks·Q&ANew measurements of a certain type of supernova seems to indicate that our expanding universe isn't accelerating at all, negating any need to invoke a mysterious 'dark energy' to explain supernovae observations.Recent observations from 1,550 supernovae fit the new 'timescape' modelThis supernova remnant that's about 16,000 light years from Earth is from a particular class of supernovae called type Ia that astronomers use to measure cosmic distances. (University of Texas/Cha...