Subj : Reinventing cosmology: New research puts To : All From : ScienceDaily Date : Tue Jul 11 2023 22:30:30 Reinventing cosmology: New research puts age of universe at 26.7 -- not 13.7 -- billion years Date: July 11, 2023 Source: University of Ottawa Summary: Our universe could be twice as old as current estimates, according to a new study that challenges the dominant cosmological model and sheds new light on the so-called 'impossible early galaxy problem.' Facebook Twitter Pinterest LinkedIN Email ========================================================================== FULL STORY ========================================================================== Our universe could be twice as old as current estimates, according to a new study that challenges the dominant cosmological model and sheds new light on the so-called "impossible early galaxy problem." "Our newly-devised model stretches the galaxy formation time by a several billion years, making the universe 26.7 billion years old, and not 13.7 as previously estimated," says author Rajendra Gupta, adjunct professor of physics in the Faculty of Science at the University of Ottawa. For years, astronomers and physicists have calculated the age of our universe by measuring the time elapsed since the Big Bang and by studying the oldest stars based on the redshift of light coming from distant galaxies. In 2021, thanks to new techniques and advances in technology, the age of our universe was thus estimated at 13.797 billion years using the Lambda-CDM concordance model. However, many scientists have been puzzled by the existence of stars like the Methuselah that appear to be older than the estimated age of our universe and by the discovery of early galaxies in an advanced state of evolution made possible by the James Webb Space Telescope. These galaxies, existing a mere 300 million years or so after the Big Bang, appear to have a level of maturity and mass typically associated with billions of years of cosmic evolution. Furthermore, they're surprisingly small in size, adding another layer of mystery to the equation. Zwicky's tired light theory proposes that the redshift of light from distant galaxies is due to the gradual loss of energy by photons over vast cosmic distances. However, it was seen to conflict with observations. Yet Gupta found that "by allowing this theory to coexist with the expanding universe, it becomes possible to reinterpret the redshift as a hybrid phenomenon, rather than purely due to expansion." In addition to Zwicky's tired light theory, Gupta introduces the idea of evolving "coupling constants," as hypothesized by Paul Dirac. Coupling constants are fundamental physical constants that govern the interactions between particles. According to Dirac, these constants might have varied over time. By allowing them to evolve, the timeframe for the formation of early galaxies observed by the Webb telescope at high redshifts can be extended from a few hundred million years to several billion years. This provides a more feasible explanation for the advanced level of development and mass observed in these ancient galaxies. Moreover, Gupta suggests that the traditional interpretation of the "cosmological constant," which represents dark energy responsible for the accelerating expansion of the universe, needs revision. Instead, he proposes a constant that accounts for the evolution of the coupling constants. This modification in the cosmological model helps address the puzzle of small galaxy sizes observed in the early universe, allowing for more accurate observations. * RELATED_TOPICS o Space_&_Time # Cosmology # Astrophysics # Big_Bang # Galaxies # Astronomy # Cosmic_Rays # Space_Telescopes # Solar_System * RELATED_TERMS o Big_Bang o Dark_energy o Ultimate_fate_of_the_universe o Galaxy_formation_and_evolution o Cosmic_microwave_background_radiation o Andromeda_Galaxy o Spitzer_space_telescope o Milky_Way ========================================================================== Print Email Share ========================================================================== ****** 1 ****** ***** 2 ***** **** 3 **** *** 4 *** ** 5 ** Breaking this hour ========================================================================== * Revolutionary_Electric_Artificial_Muscles * Age_of_Universe:_26.7,_Not_13.7,_Billion_Years * City_Ground_Is_Deforming:_Buildings_Aren't_Ready * The_Sound_of_Silence?_People_Hear_It * 36-Million-Year_Geological_Cycle_Drives_... * Six_Foods_to_Boost_Cardiovascular_Health * Cystic_Fibrosis:_Lasting_Improvement * Artificial_Cells_Demonstrate_That_'Life_... * Advice_to_Limit_High-Fat_Dairy_Foods_Challenged * First_Snapshots_of_Fermion_Pairs Trending Topics this week ========================================================================== SPACE_&_TIME NASA Space_Missions Asteroids,_Comets_and_Meteors MATTER_&_ENERGY Nature_of_Water Materials_Science Civil_Engineering COMPUTERS_&_MATH Artificial_Intelligence Neural_Interfaces Computers_and_Internet ========================================================================== Strange & Offbeat ========================================================================== SPACE_&_TIME Reinventing_Cosmology:_New_Research_Puts_Age_of_Universe_at_26.7_--_Not_13.7_- -_Billion_Years Quasar_'Clocks'_Show_Universe_Was_Five_Times_Slower_Soon_After_the_Big_Bang First_'Ghost_Particle'_Image_of_Milky_Way MATTER_&_ENERGY Revolutionary_Self-Sensing_Electric_Artificial_Muscles Bees_Make_Decisions_Better_and_Faster_Than_We_Do,_for_the_Things_That_Matter_to Them These_Lollipops_Could_'Sweeten'_Diagnostic_Testing_for_Kids_and_Adults_Alike COMPUTERS_&_MATH Number_Cruncher_Calculates_Whether_Whales_Are_Acting_Weirdly AI_Tests_Into_Top_1%_for_Original_Creative_Thinking Researchers_Create_Highly_Conductive_Metallic_Gel_for_3D_Printing Story Source: Materials provided by University_of_Ottawa. Original written by Bernard Rizk. Note: Content may be edited for style and length. ========================================================================== Journal Reference: 1. R Gupta. JWST early Universe observations and LCDM cosmology. Monthly Notices of the Royal Astronomical Society, 2023; DOI: 10.1093/mnras/ stad2032 ========================================================================== Link to news story: https://www.sciencedaily.com/releases/2023/07/230711133118.htm --- up 1 year, 19 weeks, 1 day, 10 hours, 50 minutes * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3) .