Free Astronomy Magazine January-February 2025 ARABIC VERSION

A surprisingly smooth disk around Vega byNASA/ESA/CSA Ray Villard ChristinePulliam nthe1997movie Contact ,adapted from Carl Sagan’s 1985 novel, the lead character scientist Ellie Ar- roway(playedbyactorJodiFoster) takesaspace-alien-builtwormhole ride to the star Vega. She emerges inside a snowstorm of debris encir- clingthestar–butnoobviousplan- etsarevisible.Itlookslikethefilm- makersgot itright. A team of astronomers at the Uni- versity of Arizona, Tucson used NASA’s Hubble and James Webb space telescopes for an unprece- dented in-depth look at the nearly 100-billion-mile-diameter debris diskencirclingVega. “Betweenthe Hubble and Webb telescopes, you get this very clear view of Vega. It’s amysterioussystembecauseit’sun- ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 20 ﻗﺮصﻧ ﻤﻲأﻣﻠﺲ ﺣﻮل ﻧ ﻢ اﻟﻨﺴﺮاﻟﻮاﻗﻊ : ﻘﻠﻢ رايﻓ ﻼرد و ﺑﻮﻟ ﺎم ﻛﺮﺴﺘ و ﺎﻟﺔ ﻧﺎﺳﺎ / و ﺎﻟﺔ اﻟﻔﻀﺎء اﻷوروﺑ ﺔ / و ﺎﻟﺔ اﻟﻔﻀﺎء اﻟﻜﻨﺪ ﺔ ﺘﺤﺪث اﺗﺼﺎل " ﻓﻴﻠﻢ ﻟﻌﺎم " 1997 ا ﻘﺘﺒﺲ ﻣﻦ رواﻳﺔ ﻛﺎرل ﺳﺎ ﺎنﻏ ﻟﻌﺎم 1985 ﺗﻨﻄﻠـﻖ اﻟﻌﺎ ﺔ اﻟﺮﺋﻴﺴﻴﺔ إﻳـﲇ أرواي ) اﻟﺘـﻲ ﻟﻌﺒـﺖ دورﻫﺎ ا ﻤﺜﻠﺔ ﺟﻮدي ﻓﻮﺳﱰ ( ﰲ رﺣﻠﺔ ﻋـﱪ ﺛﻘﺐ د ودي ﺑﻨﺎه ﻛﺎﺋﻦ ﻓﻀﺎﺋﻲ إﱃ ﻧﺠﻢ اﻟﻨﴪ اﻟﻮاﻗﻊ . ( ﻓﻴﻐﺎ ) ﺗﺨﺮج ﻣـﻦ داﺧـﻞ ﻋﺎﺻـﻔﺔ ﺛﻠﺠﻴﺔ ﻣﻦ اﻟﺤﻄﺎم ا ﺤﻴﻂ ﺑﺎﻟﻨﺠﻢ وﻟﻜـﻦ ﻻ ﺗﻮﺟﺪ ﻛﻮاﻛـﺐ واﺿـﺤﺔ ﻣﺮﺋﻴـﺔ و ﻳﺒـﺪو أن ﺻﻨﺎع اﻟﻔﻴﻠﻢ أﺻﺎﺑﻮا . ﰲ اﻷﻣﺮ ﻟﻘﺪ اﺳﺘﺨﺪم ﻓﺮﻳـﻖ ﻣـﻦ ﻋﻠﻤـﺎء اﻟﻔﻠـﻚ ﰲ ﺟﺎﻣﻌﺔ أرﻳﺰوﻧﺎ ﰲ ﺗﻮﺳﺎن ﺗﻠﺴﻜﻮﺑﻲ ﻫﺎﺑـﻞ وﺟﻴﻤﺲ وﻳﺐ اﻟﻔﻀﺎﺋﻴ اﻟﺘـﺎﺑﻌ ﻟﻮﻛﺎﻟـﺔ ﻧﺎﺳﺎ ﻹﻟﻘﺎء ﻧﻈﺮة ﻏ ﻣﺴﺒﻮﻗﺔ ﻋﲆ ﻗـﺮص اﻟﺤﻄﺎم اﻟﺬي ﻳﺒﻠﻎ ﻗﻄﺮه ﻣﺎ ﻳﻘﺮب ﻣﻦ 100 ﻣﻠﻴﺎر ﻣﻴـﻞ واﻟـﺬي ﻳﺤـﻴﻂ ﺑـﻨﺠﻢ اﻟﻨــﴪ اﻟﻮاﻗﻊ . ﺑ ﺗﻠﺴﻜﻮﺑﻲ ﻫﺎﺑﻞ ووﻳﺐ ﺗﺤﺼـ ﻞ ﻋﲆ ﻫﺬه اﻟﺮؤﻳﺔ اﻟﻮاﺿﺤﺔ ﺟﺪ اً ﻟﻬﺬا اﻟﻨﺠﻢ . اﻟــــــﺘﻘﻂ ﺗﻠﺴــــــ ﻮبﻫﺎﺑـــــــﻞ اﻟﻔﻀـــــــﺎﺋﻲﺻـــــــﻮرة ــــﺎري ﻳ ﻠــــﻎ ﻋﺮﺿــــﮫ ﻣﻠﻮﻧـــﺔ زاﺋﻔــــﺔ ﻟﻘــــﺮصﻏ 100 ــــــــﺎرﻣﻴــــــــﻞ ﻣﻠ ــــــــﺎﻟﻨ ﻢ اﻟﺴــــــــﺎﻃﻊ ﻳﺤــــــــ ﻂ اﻟﻨﺴــــــــﺮ اﻟﻮاﻗـــــــــــــﻊ . رﺻـــــــــــــﺪ ﺗﻠﺴـــــــــــــ ﻮب ﻫﺎﺑـــــــــــــﻞ اﻟﻀـــــــــــــﻮء اﻟﻤـــ ـــﻢ ﺟﺴـــ ﻤﺎت اﻟـــﺪﺧﺎن ـــﺎرﺑﺤ ﻨﻌﻜﺲﻣـــﻦ ﻏ ﺘﻤﺮﻛــــﺰ ﺸــــ ﻞ ﻛﺒــــ ﻓــــﻲﻫﺎﻟــــﺔ ﺣــــﻮل واﻟــــﺬ ﻣﺤ ﻂ اﻟﻘﺮص . ﺘﻤ اﻟﻘﺮص ﺴﻄﺤﮫ اﻷﻣﻠـﺲ ـــــﺔ، دون أي دﻟﻴــــــﻞ ﻋﻠــــــﻰوﺟــــــﻮد ﻟﻠﻐﺎ ﻮاﻛــــــﺐ ﻛﺒ ة ﻣﺪﻣﺠﺔ داﺧﻠﮫ وﻳﺤﺠﺐ اﻟ ﻘﻌﺔ اﻟﺴﻮداء ﻓﻲ اﻟﻤﺮﻛﺰوﻫﺞ اﻟﻨ ﻢ اﻟﺸﺎب اﻟﺴﺎﻃﻊ ". - ﻳﻨﺎﻳﺮ ﻓﺒﺮﺍﻳﺮ 2 0 2 5 [NASA, ESA, CSA, STScI, S.Wolff (University of Arizona),K. Su (University of Arizona), A. Gáspár University of Arizona)]