Scientists have found the Universe to be growing that too at a faster pace and thus, the scientists have decided to incorporate totally new physics into their existing theories regarding the cosmos’ functionality. At present, the revised version of the expansion rate has shown a 10% faster growth rate than the earlier predicted observations of the Universe’s catastrophic events due to the Big Bang. The study clearly lowers the chances that the current disparity is a mere coincidence. The mismatch has forced scientists to study the subject in even more detail in order to avoid any future possibility of dismal. According to Professor Adam Riess from The Johns Hopkins University, such a growth rate of the Universe was something highly unexpected.
The acceleration in the Universe’s expansion is surprising and thus, many scientists hope the repulsive and mysterious force that is dark energy to be the source behind such an event. The Hubble Space Telescope was used by Riess and his colleagues to determine70 Cepheid variable stars in the Large Magellanic Cloud (LMC) that is a Milky Way’s satellite galaxy. The dimming and brightening of the Cepheid variables at unexplainable rates have given it the standard candles tag that permit scientists measure distances.
The Araucaria Project has its observations included in Riess and his team’s study. The researchers from a number of nations have studied numerous LMC binary star systems dealing with the dimming taking place when one star crosses right in front of its neighbor. The current study has helped researchers obtain a better understanding of the Cepheids’ intrinsic brightness. The scientists have used all the information obtained to determine the universe’s present-day expansion rate that is a value currently known as the Hubble constant. The constant is about 46.0 miles per second per megaparsec and 1megaparsec is roughly calculated to be 3.26 million light-years. As per the calculations, the expansion rate is assumed to be about 41.9 miles per second per megaparsec.