Free Astronomy Magazine July-August 2026 ARABIC VERSION

A WASP-189b echoes the composition ofitshoststar by NOIRLab Josie Fenske lmost320light-yearsaway in the Libra constellation lies WASP-189b,anexoplanet knownasanultra-hotJupiter(UHJ). UHJs have temperatures high enough to vaporize rock-forming elementslikemagnesium(Mg),sili- con (Si), and iron (Fe), offering a rare opportunity to see these ele- ments using spectroscopy — the technique of breaking up light into itscomponentwavelengthstoiden- tify the presence of chemicals. An international team ofas- tronomers led by Jorge Antonio Sanchez, a graduate student at Arizona State University (ASU) ob- served WASP-189 b using the high- resolution Immersion GRating IN- frared Spectrograph (IGRINS) when it was mounted on the Gemini South telescope in Chile. This powerful instrument allowed themtosimultaneouslymeasure JULY-AUGUST2026 ﻘـﻊ اﻟﻜﻮﻛﺐ اﻟﺨﺎرﺟﻲ WASP-189 b ﻋـﲆ ﺑُﻌﺪ ﻳﻘﺎرب 320 ﺳﻨﺔ ﺿﻮﺋﻴﺔ ﻣـﻦ اﻷرض ﰲ اﺗﺠﺎه ﻛﻮﻛﺒـﺔ ا ﻴـﺰان وﻫـﻮ أﺣـﺪ اﻟﻜﻮاﻛـﺐ ا ﻌﺮوﻓﺔ » ﺑﺎﺳﻢ ا ﺸﱰﻳﺎت ﻓﺎﺋﻘـﺔ اﻟﺤـﺮارة « وﺗﺘﻤﻴﺰ ﻫﺬه اﻟﻔﺌﺔ ﺑﺪرﺟﺎت ﺣـﺮارة ﻣﺮﺗﻔﻌـﺔ ﻟﻠﻐﺎﻳ ـﺔ ﺗﻜﻔ ـﻲ ﻟﺘﺒﺨ ـ اﻟﻌﻨ ـﺎﴏ ا ﻜﻮِﻧ ـﺔ ﻟﻠﺼــﺨﻮر ﻣﺜــﻞ ا ﻐﻨﻴﺴــﻴﻮم واﻟﺴــﻴﻠﻜﻮن واﻟﺤﺪﻳﺪ ﻣﻤﺎ ﻳﺘـﻴﺢ ﻟﻠﻌﻠﻤـﺎء ﻓﺮﺻـﺔ ﻧـﺎدرة ﻟﺮﺻـﺪ ﻫـﺬه اﻟﻌﻨ ـﺎﴏﻣﺒ ـﺎﴍة ﰲ أﻏﻠﻔ ـﺔ اﻟﻜﻮاﻛﺐ اﻟﺠﻮﻳﺔ ﺑﺎﺳﺘﺨﺪام اﻟﺘﺤﻠﻴﻞ اﻟﻄﻴﻔﻲ . مﻗﺎ ﻓﺮﻳـﻖ دو ﱄ ﻣـﻦ ﻋﻠﻤـﺎء اﻟﻔﻠـﻚ ﺑﻘﻴـﺎدة ﺧﻮرﺧﻲ أﻧﻄﻮﻧﻴﻮ ﺳﺎﻧﺸﻴﺰ ﻃﺎﻟﺐ اﻟﺪراﺳـﺎت اﻟﻌﻠﻴ ـﺎ ﰲ ﺟﺎﻣﻌ ـﺔ وﻻﻳ ـﺔ أرﻳﺰوﻧ ـﺎ ﺑ ﺪراﺳـﺔ ا ﻟﻜﻮﻛﺐ ﺑﺎﺳﺘﺨﺪام ﻣﻄﻴـﺎف اﻷﺷـﻌﺔ ﺗﺤـﺖ اﻟﺤﻤﺮاء ﻋﺎﱄ اﻟﺪﻗﺔ ) آي ﺟﺮﻧـﺰ ( ا ﺜﺒـﺖ ﻋـﲆ ﺗﻠﺴﻜﻮب ﺟﻴﻤﻴﻨﻲ اﻟﺠﻨﻮﺑﻲ ﰲ ﺗﺸﻴﲇ . وأﺗﺎﺣﺖ ﻫﺬه اﻷداة ا ﺘﻘﺪﻣﺔ ﻟﻠﺒﺎﺣﺜ ﻗﻴﺎس ﻣﺤﺘﻮى اﻟﻐﻼف اﻟﺠﻮي ﻟﻠﻜﻮﻛﺐ ﻣﻦ ﻋﻨﴫي ا ﻐﻨﻴﺴﻴﻮم واﻟﺴـﻴﻠﻴﻜﻮن ﰲ اﻟﻮﻗـﺖ ﻧﻔﺴـﻪ، وﻫﻲ ا ﺮة اﻷوﱃ اﻟﺘﻲ ﻳﺘﻢ ﻓﻴﻬﺎ إﺟﺮاء ﻣﺜﻞ ﻫﺬا ـــــــــــــــــــــــــــــــــــــ رﺳــــــﻢ ﺗﺨ ﻠــــــﻲ ﻤﺜــــــﻞ ــــــﺎً ﻮﻛ ــــــﺎً ﺧﺎرﺟ ﻣــــــﻦ ﻓﺌــــــﺔ اﻟﻤﺸ ي ـ ﻓﺎﺋﻖ اﻟ ﺤﺮارة ﺣ ـﻢ أزرق ﻮل ﻧ أﺑـ ﺾﻣـﻦ اﻟﻨﻮع A ﻗﺮﺐﺟﺪاً ﻣﻦ ﻧ ﻤﮫ . [International Gemin iObserv tory /NOIRLab/NSF/AURA/ J. Pollard] - ﻳﻮﻟﻴﻮ ﺃﻏﺴﻄﺲ 2 0 2 6 : ﻘﻠﻢ ﺟﻮزيﻓ ﻨﺴﻜﻲ ﻣﺨﺘ ﻧﻮﻳﺮﻻب WASP-189 ﻄﺎﺑﻖ ﺗﺮﻛﻴ ﺔ ﻧ ﻤﮫ اﻟﻤﻀ ﻒ ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 22