Free Astronomy Magazine January-February 2025 ARABIC VERSION

searchers from over 70 institutions around the world and is managed by the Department of Energy’s LawrenceBerkeleyNationalLabora- tory (Berkeley Lab). In their new study, DESI researchers foundthatgravitybehavesaspre- dicted by Einstein’s general theoryofrelativity.Theresultvalidates our leading model of the Universe and limits possible theories of modified gravity, which have been proposedas alternative ways to explain unex- pectedobservations,suchastheac- ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 49 ﻟـﻮراﻧﺲ ﺑـ ﻛﲇ اﻟـﻮﻃﻨﻲ اﻟﺘـﺎﺑﻊ ﻟـﻮزارة اﻟﻄﺎﻗﺔ ) ﻣﺨﺘﱪ ﺑ ﻛﲇ .( ﰲ دراﺳﺘﻬﻢ اﻟﺠﺪﻳﺪة، وﺟﺪ ﺑﺎﺣﺜﻮ ﻣﻄﻴـﺎف اﻟﻄﺎﻗﺔ ا ﻈﻠﻤﺔ أن اﻟﺠﺎذﺑﻴﺔ ﺗﺘﴫـف ﻛﻤـﺎ ﺗﻨﺒــﺄت ﺑﻬــﺎ ﻧﻈﺮﻳــﺔ اﻟﻨﺴــﺒﻴﺔ اﻟﻌﺎﻣــﺔ ﻷﻳﻨﺸﺘﺎﻳﻦ . وﺗﺜﺒﺖ اﻟﻨﺘﻴﺠﺔ ﺻﺤﺔ ﻧﻤﻮذﺟﻨـﺎ ـــ اﻟﺸــﺮﻂ اﻟﻼﻣـــﻊ ﻟﻤﺠـــﺮة در اﻟﺘ ﺎﻧـــﺔ ﻈﻬـــﺮ ﻓــــﻲ ــــﺔ ﺗﻠﺴــــ ﻮب ﺧﻠﻔ ــــﺎل اﻟــــﺬ ــــﻮﻻسﻣﺎ ﻧﻴ ﻳ ﻠﻎ ﻗﻄﺮﻩ 4 أﻣﺘﺎ ـﻚ ر و ﻘﻊ ﻓﻲﻣﺮﺻﺪ ﻛ ﺖ ﺑ اﻟﻮﻃ ﺎﻟﻘﺮ ﻣﻦ ﻣﺪ ﻨﺔ ﺗﻮﻛﺴﻮن أر ﺰوﻧﺎ . ] KPNO/NOIRLab/NSF/AURA/R.T.Sparks [ اﻟﺮاﺋﺪ ﻟﻠﻜﻮن وﺗﺤﺪ ﻣﻦ اﻟﻨ ﻈﺮ ﻳﺎت ا ﺤﺘﻤﻠـﺔ ﻟﻠﺠﺎذﺑﻴﺔ ا ﻌﺪﻟﺔ واﻟﺘﻲ ﺗﻢ اﻗﱰاﺣﻬﺎ ﻣﻦ ﻗﺒﻞ ﻋﻠﻤﺎء اﻟﻔﻠﻚ ﻛﻄﺮق ﺑﺪﻳﻠﺔ ﻟﺘﻔﺴ اﻷرﺻـﺎد ﻏ ا ﺘﻮﻗﻌﺔ اﻟﺘﻲ ﺗﺸﻤﻞ اﻟﺘﻮﺳﻊ ا ﺘﺴﺎرع ﻟﻜﻮﻧﻨﺎ واﻟﺬي ﻳُﻌﺰى ﻋﺎدةً إﱃ ﻣﺎ ﻳﻌﺮف ﺑﺎﺳﻢ اﻟﻄﺎﻗﺔ ا ﻈﻠﻤﺔ .