The scientists have come up with a new theory that the universe is expanding way faster than it is supposed to be and the scientists are pretty amazed. The rate of expansion of the universe is known as Hubble Constant which is very difficult to look for. The data which was collected by using the Planck satellite showed that the Hubble Constant should be 67.4 kilometers per second per megaparsec and it should be uncertain at the level of less than 1 percent.
The main function of the satellite was to measure the cosmic microwave background which showed these results. The changes in the wavelength of light as the object moves farther away defines the Hubble Constant and the definition was given by Edwin Hubble who observed the Doppler shift of retreating nebulae but now the methods and definitions have been changed according to the conditions and time but the principle is same as before.
A Cepheid variable of the Hubble Constant showed the expansion rate of 73.5 kilometers per second per megaparsec in 2018 and the calculations were made using the standard candles like Cepheid variable stars as its luminosity gives accurate results and even faster than the Planck data.
The new results showed that the Hubble Constant is 74.03 kilometers per second per megaparsec which is even nine percent faster than results that came out of Planck satellite. Astrophysicist Ada Riess from Space Telescope Science Institute (STScI) and Johns Hopkins University conveyed, “The Hubble tension between the early and late Universe may be the most exciting development in cosmology in decades, this mismatch has been growing and has now reached a point that is really impossible to dismiss as a fluke. This disparity could not plausibly occur by chance.” Riess also said, “We are measuring something fundamentally different. One is a measurement of how fast the Universe is expanding today, as we see it. The other is a prediction based on the physics of the early Universe and on measurements of how fast it ought to be expanding.”