For less than a century , we have known that the creation is expanding . Only 20 years ago , data point suggested that the expanding upon was accelerated . To explain this , uranologist proposed the macrocosm of dark push , a mysterious substance responsible for the accelerated expanding upon .
However , we have yet to find dark energy . Now , a squad of researchers from the University of Canterbury , New Zealand , suggest that dark Department of Energy might not exist at all . They propose a construct call “ timescape cosmogony ” , where dark energy does n’t be . Instead , galaxies might be seeing the expansion of the universe as accelerated or retard reckon on their location .
The newspaper publisher , published in theMonthly Notices of the Royal Astronomical Society , enunciate that a flaw in the dark energy hypothesis is the trust on Friedmann ’s equality , the normal that describes the enlargement of the universe as a whole .
One requirement of this is promise the cosmological principle . This is the idea that on a tumid scale of measurement , the universe is the same everywhere and looks the same in every charge . patently , at modest scales , we have galaxies , major planet , and capybara , but the creation as a whole looks like statistically homogeneous and isotropous , according to data . The cosmologic principle seems to be respected in tolerant footing .
But there are a telephone number of observance that conflict with the principle , so maybe the observation and equating only approximate what ’s actually going on in the universe . " The past debate missed an essential point ; if dark push does not exist , then a probable alternative is that the fair expansion law does not keep an eye on Friedmann ’s equivalence , " senior source Professor David Wiltshire said in astatement .
The researchers exact that the timescape simulation fits the expansion model just as accurately as the grim energy model , known asLambda - CDM . The investigator submit that even if this mannequin turns out not to be the correct one , it could be useful in examination for choice bias that might not have been take into account in other analyses .
dingy vigour is gestate to make up 70 percent of the energy substance of the universe of discourse . To understand if it exist ( and its properties ) , we require not only more observations , but a better understanding of how the object we employ in those observations , like supernovae , really work .
