Nobel Prize Winner Adam Riess: The Hubble Tension is Getting WORSE! (#231)

Chat with Nobel Prize winner Adam Riess about his team's newest
measurements of the 'most important number in cosmology' the Hubble
Constant. Using the Hubble Space Telescope for what it was meant to
do, Adam's team continues to make ultra-precise measurements. We'll
also explore the Hubble Tension, the future of Hubble now that the
James Webb Space Telescope has deployed, and other cosmic
conundrums. Adam is a brilliant teacher and a wonderful raconteur.
Don't miss your chance to chat with a brilliant scientist about the
most important topic in cosmology today! From the team:
https://hubblesite.org/contents/news-releases/2022/news-2022-005
From CNN: Measuring the expansion rate of the universe was one of
the Hubble Space Telescope’s main goals when it was launched in
1990. Over the past 30 years, the space observatory has helped
scientists discover and refine that accelerating rate – as well as
uncover a mysterious wrinkle that only brand-new physics may solve.
Hubble has observed more than 40 galaxies that include pulsating
stars as well as exploding stars called supernovae to measure even
greater cosmic distances. Both of these phenomena help astronomers
to mark astronomical distances like mile markers, which have
pointed to the expansion rate. In the quest to understand how
quickly our universe expands, astronomers already made one
unexpected discovery in 1998: “dark energy.” This phenomenon acts
as a mysterious repulsive force that accelerates the expansion
rate. And there is another twist: an unexplained difference between
the expansion rate of the local universe versus that of the distant
universe right after the big bang. Scientists don’t understand the
discrepancy but acknowledge that it’s weird and could require new
physics. “You are getting the most precise measure of the expansion
rate for the universe from the gold standard of telescopes and
cosmic mile markers,” said Nobel Laureate Adam Riess at the Space
Telescope Science Institute and a distinguished professor at the
Johns Hopkins University in Baltimore, in a statement. “This is
what the Hubble Space Telescope was built to do, using the best
techniques we know to do it. This is likely Hubble’s magnum opus,
because it would take another 30 years of Hubble’s life to even
double this sample size.” Adam Guy Riess (born December 16, 1969)
is an American astrophysicist and Bloomberg Distinguished Professor
at Johns Hopkins University and the Space Telescope Science
Institute. He is known for his research in using supernovae as
cosmological probes. Riess shared both the 2006 Shaw Prize in
Astronomy and the 2011 Nobel Prize in Physics with Saul Perlmutter
and Brian P. Schmidt for providing evidence that the expansion of
the universe is accelerating. https://www.stsci.edu/~ariess/ Please
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