Thirty years of Hubble Space Telescope galaxy observations have now delivered one of the most accurate estimates of the expansion rate of the Universe – and also assure us that something is basically lose from our current understanding of the Universe .
As reported inThe Astrophysical Journal , researchers using the veteran outer space scope have estimated that the expansion rate of the Universe is 73 kilometers per 2nd per megaparsec plus or minus 1 . That think of that if you expect at an target 1 million parsecs ( 3.26 million light - years ) away , the expansion of the universe would make it front like it is moving out from you at 73 kilometers per 2d ( over 163,000 miles per hour ) .
The new data is now known with just over 1 pct dubiousness . However , the problem is that a all unlike estimate of the elaboration pace of the Universe just 400,000 years after the Big Bang estimates that the expansion is 67.5 kilometers per second per megaparsec plus or minus 0.5 . The tautness between the two measurement has just grown and grownin the last few years .
We do not do it why the two numbers do n’t match , and there is only a million - to - one hazard that the latent hostility between the two is a fluke . Our leading theory tells us they should be the same , so this suggest that there might be something else out there we are yet to let in .
" The Hubble constant is a very special act . It can be used to draw a needle from the past to the present for an final stage - to - end mental test of our sympathy of the universe . This took a phenomenal amount of elaborate work , " a member of the team Dr. Licia Verde , a cosmologist at ICREA and the ICC - University of Barcelona , said in astatement .
The scientific coaction is call Supernova , H0 , for the Equation of State of Dark Energy ( SHOES ) where H0is the Hubble constant , the value of the expansion pace of the Universe . They keep 42 supernovae milepost markers . These particular types of outcome happen about once per class , so Hubble has pretty much examine all that have happened in the last three decade .
" We have a thoroughgoing sampling of all the supernovae approachable to the Hubble telescope seen in the last 40 years , " SHOES drawing card and Nobel Laureate Adam Riess of the Space Telescope Science Institute ( STScI ) and the Johns Hopkins University in Baltimore explained .
" This is what the Hubble Space Telescope was work up to do , using the best technique we know to do it . This is likely Hubble ’s magnum opus , because it would take another 30 long time of Hubble ’s life to even double this sample size . "
Over the next decade , stargazer will expand the approach to study the expansion of the Universe , and new and coming observatories will hopefully provide enough data to make us understand what ’s lead on with the Universe that we are yet to comprehend .
