Is Dark Energy Getting Stronger?

Learn More about The Great Courses Plus: http://ow.ly/wvWC30o0QYVUploaded 20-03-19PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACECheck out the new Space Time Merch Store!https://pbsspacetime.com/Support Space Time on Patreonhttps://www.patreon.com/pbsspacetimeThe power of Dark Energy may be increasing as the universe ages. Subtle clues are emerging that the accepted model for the nature of dark energy and dark matter may not be all that. We saw the first such clue recently in our recent episode on the Crisis in Cosmology. Today we’re doing a Space Time Journal Club to reveal another clue. We’re looking at a new paper in Nature Astronomy, “Cosmological constraints from the Hubble diagram of quasars at high redshifts” by Risaliti and Lusso. It hints that the cosmological constant may not be so constant after all. In fact it may be increasing. If this is true, then our prediction for the future of our universe looks VERY different, and may involve the entire universe tearing itself to shreds at the subatomic level in the Big Rip.On this edition of Space Time Journal Club we look at:Risaliti and Lusso (2019) "Cosmological Constraints from the Hubble Diagram of Quasars at High Redshifts"https://www.nature.com/articles/s41550-018-0657-z#darkenergy #darkmatter #spacetimeMore about The Great Courses Plus: The Great Courses Plus is currently available to watch through a web browser to almost anyone in the world and optimized for the US, UK, and Australian markets.