Star trails during the Arizona Mayall telescope, which includes spectroscopic energy of spectroscopic energy
Luke Tyas / Berkeley Lab
Dark energy is one of the most mysterious features of our universe. We don’t know what it is, but it controls the universe expanding, as well as its last fate. Now, the study of millions of heavenly objects has revealed that we have been misunderstood, with the dramatic consequences for cosmos.
“This is about 25 years since we found it about the nature of dark energy,” he says Adam Riess Johnland’s Johns Hopkins University.
The result comes from the three-year data collected by Arizona’s spectroscopic instrument (desi). By combining these data with other measures, such as maps Cosmic radiation back in the microwave And Supernovae, the Desi concluded that dark energy has changed over time – to contradict the standard model of cosmology called Lambda-CDM.
“It’s the top of the human knowledge,” says Members of the Desi Will do it percival From Canadian to Waterloo University. “We’re watching something amazing with the whole universe.”
It is Desi Mounted on a telescope and “Red change“The light or, clearly emitted by the residents of distant galaxies, can determine how the universers spread during the light trip and examine how this dissemination changes. So far, the team has studied almost 15 million bright objects and other bright objects in the sky.
For decades, physicists agreed that the universe is expanding at a fixed acceleration rate, a cosmological constant known as Lambda Dark energy. But in April 2024, Desi’s measurements showed the first advice with universes It can quickly accelerate quickly over time – Cosmological constant is not so constant.
Ressus that does not belong to the desi team says that at the time he didn’t make sure the findings would last with more data. In fact, it was stronger alone. “It’s very exciting for me (Group) that no problem find no problem after another year in the analysis, and after more data, it’s more significant result,” he said.
That said, the discovery does not yet meet the “5 sigma” level statistics, which are commonly used as a real discovery than statistical flow. Current analysis reaches a maximum of 4.2 sigma, but teammate Mustapha Isaac-Boushaki At Dallasen University of Texas, the Group believes, as the desi continues to take the data, the results must reach 5 Sigma in two years. “This conclusion of the dark result is something we didn’t expect in our lives,” he said.
A quiet, says Ishak-Boushaki, that the findings are not only based on desi data, but it does not rely on other surveys of the universe. The state of Riess is compared to a multi-legged chair when he breaks a leg, or removes a data set – not completely crushing the conclusion.
Assuming that he holds his legs, the universe could be very different from our current image. If dark energy continues to weaken, the universe can reach a situation that is spreading on a constant rate, faster and faster, says Ishak-Boushaki. Some dramatic scenarios are also plainly plainly, such as “great crunch”, where the cosmos begin to hire and eventually falls on his ownHe says.
The exact future of the universe remains an open question, and there is no desire tool being used to respond to unique researchers. Other surveys of the Riess Universe are, such as NASA Nancy Grace Roman Space telescope and Vera Rubin Observatory In Chile, those designed to dispose of lights about the real nature of dark energy.
While Mathematical models A changing universe changing the dark energy must still be caught with these observations, Percival’s theoretical work hopes that our hypotheses will help more experiments that will test our hypotheses directly about this mysterious force.
“As for theoretical models, the Pandora’s box has just opened. We were stuck with a constant cosmology,” says Ishak-Bushaki. “We’re not stuck further.”
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