“While the Hubble Constant is constant everywhere in space at a given time, it is not constant in time.” explains Chris Fassnacht, professor of physics at UC Davis about the current crisis in cosmology, or “tension”, in understanding the rate of expansion of the universe —known as the “Hubble Constant”—since the Big Bang, a central part of the quest to discover the origins of the universe.
Arguably the most important Cosmological discovery ever made, Hubble’s Constant, is that our universe is expanding. Its stands, observes the Harvard -Smithsonian Center for Astrophysics, along with the Copernican Principle — that there is no preferred place in the universe, and Olbers’ paradox — that the sky is dark at night, as one of the cornerstones of modern cosmology.
“The Hubble Constant is one of the most important numbers in cosmology because it is essential for estimating the curvature of space and the age of the universe, as well as exploring its fate,” said Hiranya Peiris, at University College London. Peiris, a British astrophysicist best known for her work on the cosmic microwave background radiation, was one of 27 scientists who received the Breakthrough Prize in Fundamental Physics in 2018 for their “detailed maps of the early universe.”