#riess — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #riess, aggregated by home.social.
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Sehr geehrtes Wahlvieh in Rheinland-Pfalz, wählt Kai Riess, er überwindet Inhalte sehr gut!
#DiePARTEI #BTW25 #RheinlandPfalz #Landau #Riess #Bundestag #Inhalteüberwinden #Vollbart @parteilandau -
#Dark #energy was assumed to be a #constant force in the universe, both currently and throughout cosmic history.
But new data suggest that it may be more changeable, growing stronger or weaker over time, reversing or even fading away.
“As #Biden would say, it’s a B.F.D.,” said #Adam #Riess, an astronomer at Johns Hopkins University and the Space Telescope Science Institute in Baltimore.
Riess shared the 2011 Nobel Prize in Physics with two other astronomers for the discovery of dark energy, but was not involved in this new study.“It may be the first real clue we have gotten about the nature of dark energy in 25 years,” he said.
If the work of dark energy were constant over time, it would eventually push all the stars and galaxies so far apart that even atoms could be torn asunder, sapping the universe of all life, light, energy and thought.
Instead, it appears, dark energy is capable of changing course and pointing the cosmos toward a richer future.Wendy Freedman, an astrophysicist at the University of Chicago who has led efforts to measure the expansion of the universe, praised the new survey as “superb data.”
The results, she said, “open the potential for a new window into understanding dark energy, the dominant component of the universe, which remains the biggest mystery in cosmology
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Physicists have deduced subtle hints that the 🔸#dark #energy 🔸that drives the universe to expand faster and faster may be slightly #weakening with time.
“If true, it would be the first real clue we have gotten about the nature of dark energy in 25 years,” said #Adam #Riess, an astrophysicist at Johns Hopkins University 🌟who won the Nobel Prize for co-discovering dark energy in 1998.🌟
The new observations come from the ♦️Dark Energy Spectroscopic Instrument♦️ ( #DESI ) team, which today unveiled a #map of the cosmos of unprecedented scope, along with a bonanza of measurements derived from the map.
To many researchers, the highlight is a plot showing that three different combinations of observations all insinuate that the influence of dark energy may have eroded over the eons.
“It’s possible we’re seeing hints of dark energy evolving,” said Dillon Brout of Boston University, a member of the DESI team.
Researchers inside and outside of the collaboration all stress that the evidence is not strong enough to claim a discovery.
The observations favor the erosion of dark energy with the sort of middling statistical significance that could easily vanish with additional data.
But researchers also note that three distinct sets of observations all point in the same intriguing direction, one that’s at odds with the standard picture of dark energy as the intrinsic energy of the vacuum of space
— the quantity that Albert Einstein dubbed the “cosmological constant” due to its unvarying nature.“It’s exciting,” said Sesh Nadathur, a cosmologist at the University of Portsmouth who worked on the DESI analysis. “If dark energy is not a cosmological constant, that’s going to be a huge discovery.”
https://www.quantamagazine.org/dark-energy-may-be-weakening-major-astrophysics-study-finds-20240404/
