Free Astronomy Magazine November-December 2025 ARABIC VERSION

F Rare stellar blast reveals a heavy-element core byKeckObservatory Meagan O’Shea orthefirsttime,scientistshave confirmed a new subclass of ex- ploding star, made possible by spectraldatacapturedbytheW.M. KeckObservatoryatopMaunakea, Hawai ‘ i Island. The discovery chal- lengesexistingmodelsofstellarevo- lution, revealing new pathways for how massive stars end their lives. “This is the first time we have seen a star that was essentially stripped tothebone,” saidSteveSchulze, lead author and research associateat Northwestern University’s Center forInterdisciplinaryExplorationand ٍ◌ NOVEMBER-DECEMBER2025 ﺔ ﻣﺠﻠ FreeAstronomy ﺎﻟﻌﺮ ﺔ 40 إ ﻧﻔﺠﺎرﻧ ﻤﻲﻧﺎدر ﻜﺸﻒﻋﻦ ﻧﻮاة ﺛﻘ ﻠﺔ : ﻘﻠﻢ ﻣﻴﺠﺎن أوﺷ ﺎ ﻣﺮﺻﺪ ﻛ ﻚ ﻷول ﻣﺮة أﻛﺪ اﻟﻌﻠﻤﺎء وﺟﻮد ﻓﺌﺔ ﻓﺮﻋﻴﺔ ﺟﺪﻳﺪة ﻣﻦ اﻟﻨﺠﻮم ا ﺘﻔﺠﺮة ﺑﻔﻀـﻞ اﻟﺒﻴﺎﻧـﺎت اﻟﻄﻴﻔﻴـﺔ اﻟﺘـﻲ اﻟﺘﻘﻄﻬﺎ ﻣﺮﺻﺪ دﺑﻠﻴﻮ . إم. ﻛﻴﻚ ﻋﲆ ﻗﻤﺔ ﻣﻮﻧﺎﻛﻴـﺎ ﰲ ﺟﺰﻳﺮة ﻫـﺎواي . ﻳﺘﺤـﺪى ﻫـﺬا اﻻﻛﺘﺸـ ﺎف اﻟﻨﻤـﺎذج اﻟﺤﺎﻟﻴﺔ ﻟﺘﻄﻮر اﻟﻨﺠﻮم ﻛﺎﺷ ﺎً ﻔ ﻋﻦ ﻣﺴﺎرات ﺟﺪﻳـﺪة ﻟﻜﻴﻔﻴﺔ اﻧﺘﻬﺎء ﺣﻴﺎة اﻟﻨﺠﻮم اﻟﻀﺨﻤﺔ . ﻗﺎل ﺳﺘﻴﻒ ﺷﻮﻟﺰ ا ﺆﻟﻒ اﻟ ـ ﺮﺋﻴﴘ واﻟﺒﺎﺣﺚ ا ﺸﺎرك ﰲ ﻣﺮﻛﺰ ﺟﺎﻣﻌﺔ ﻧﻮرث وﺳـﱰن ﻟ ﻠﻔﻴﺰﻳـﺎء اﻟﻔﻠﻜﻴـﺔ ة ﻣﺘﻌﺪد اﻟﺘﺨﺼﺼﺎت " : ﻫﺬه ﻫﻲ ا ﺮة اﻷوﱃ اﻟﺘﻲ ﻧﺮى ﻓﻴﻬﺎ ﻧﺠﻤ ﺎً ﻣﺘﻔﺠﺮاً ﺗﻢ ﺗﺠ ﺮﻳﺪه ﺑﺎﻟﻜﺎﻣﻞ ﺗﻘﺮﻳﺒﺎً ﻣـﻦ " ﻋﻈﺎﻣﻪ اﻟﻨﺠﻤﻴﺔ : وﻫﻲ اﻟﻄﺒﻘﺎت اﻟﺪاﺧﻠﻴﺔ اﻟﺘﻲ ﺗـﻢ ﺗﻔﺮﻳﻐﻬﺎ أﺛﻨﺎء اﻻﻧﻔﺠﺎر . ﻧﻮﻓﻤﺒﺮ - ﺩﻳﺴﻤﺒﺮ 2 0 2 5