Free Astronomy Magazine July-August 2023 ARABIC VERSION

tory in Chile. Using VISTA’s infrared camera VIRCAM, the team captured light coming from deep inside the clouds of dust. “The dust obscures these young stars from our view, making them virtually invisible to our eyes. Only at infrared wave- lengths can we look deep into these clouds, studying the stars in the making,” explains Alena Rotten- steiner, a PhD student also at the University of Vienna and co-author of the study. The survey, called VISIONS, observed star-forming re- اﻟﺠﻨﻮﺑﻲ ﰲ ﺗﺸﻴﲇ . ﺗﴩح أﻟﻴﻨﺎ روﺗﻨﺸـﺘﺎﻳﻨﺮ وﻫﻲ ﻃﺎﻟﺒﺔ دﻛﺘﻮراه أﻳﻀًﺎ ﰲ ﺟﺎﻣﻌـﺔ ﻓﻴﻴﻨـﺎ وﻣﺆﻟﻔﺔ ﻣﺸﺎرﻛﺔ ﰲ اﻟﺪراﺳـﺔ ": ﺑﺎﺳـﺘﺨﺪام ـــ ﺗُﻈﻬـﺮﻫـﺬﻩ اﻟﺼـﻮرة اﻟــﺠﺮم HH 909 A ـﺔ اﻟـ ﻓـﻲ ﻮﻛ ـ . ﺤﺮﺎء ـﺪة ﻓـﻲ اﻟﺴـﺤﺐ اﻟﻤﻠﻮﻧـﺔ ﺗﻮﻟـﺪ ﻧﺠـﻮم ﺟﺪ ﻧﺮاﻫـــﺎ ﻫﻨـــﺎ ـــﺎراﻟـــ ﻟﻠﻐـــﺎزواﻟﻐ . ﺗﻜﺸـــﻒ أرﺻـــﺎد اﻷﺷـــﻌﺔ ﺗﺤـــﺖ اﻟـــ ـ ﻤﺮاء وراء ﻫـــﺬﻩ اﻟﺼـــﻮرة ﻋـــﻦ ﺗﻔﺎﺻـــﻴﻞ ﻋـــﺎدة ﻣــﺎ ﺗﺤﺠﺒﻬـــﺎ ﺳـــﺤﺐ اﻟ ــﺪة ﻓـــﻲﻣﻨــﺎﻃﻖ ﺗﺸـــ ﻞ اﻟﻨﺠـــﻮم اﻟــ ﺟﺪ ــﺎر . ﻐ ﺗـــﻢ إﻧﺘــﺎج اﻟﺼـــﻮرة ﺎﺳـــﺘﺨﺪام ﺗــﻢ ﻤﻌﻬـــﺎ ﺑﻮاﺳــﻄﺔ أداة اﻟﺒ ﺎﻧــﺎت اﻟـــ VIRCAM اﻟﻤﺘﺼـــﻠﺔ ﺘﻠﺴــ ﻮب ﻓ ﺴـــﺘﺎ ﻋــﻦ ُﻌـــﺪ ﻓــﻲﻣﺮﺻـــﺪ ﺎراﻧـﺎل اﻟﺘـﺎﺑﻊ ﻟ ﻠﻤﺮﺻـﺪ اﻷوروﺑـﻲ اﻟــﺠﻨﻮﺑﻲ ﻓـﻲ ﺗﺸـ ﻠﻲ . ﺗـﻢ إﺟـﺮاء اﻻرﺻـﺎد ﺠـﺰء ﻣـﻦ ﻣﺴـﺢ VISIONS ـــﺔ ﺗﺸـــ ﻞ اﻟﻨﺠـــﻮم ﻓـــﻲ ﺳ ﺴـــﻤﺢ ﻟﻌﻠﻤـــﺎء اﻟﻔﻠـــﻚ ﻔﻬـــﻢ أﻓﻀـــﻞ ﻟﻜ ﻔ واﻟـــﺬ ﻫـــﺬﻩ اﻟﻤﻨـــﺎﻃﻖ اﻟﻤﻐﻄـــﺎة ﺎﻟﻐ ﺎر . [ESO / Meingast et al.] ﻛﺎﻣ ا ﻓ ﻛﺎم اﻟﺘـﻲ ﺗﻌﻤـﻞ ﺑﺎﻷﺷـﻌﺔ ﺗﺤـﺖ اﻟﺤﻤﺮاء اﻟﺘﻘﻂ اﻟﻔﺮﻳﻖ اﻟﻀـﻮء اﻟﻘـﺎدم ﻣـﻦ أﻋﻤﺎق ﺳﺤﺐ اﻟﻐﺒﺎر ." ﻳﺤﺠﺐ اﻟﻐﺒـﺎر ﻫـﺬه ـــ اﻟﻨﺠﻮم اﻟﻔﺘﻴﺔ ﻋﻦ رؤﻳﺘﻨﺎ ﻣﻤﺎ ﻳﺠﻌﻠﻬـﺎ ﻏـ ﻣﺮﺋﻴﺔ ﺗﻘﺮﻳﺒًﺎ ﻷﻋﻴﻨﻨﺎ . ﻓﻘﻂ ﰲ أﻃﻮال ﻣﻮﺟﺎت اﻷﺷﻌﺔ ﺗﺤﺖ اﻟﺤﻤﺮاء ﻳﻤﻜﻨﻨ اﻟﺎ ﻨﻈﺮ ﺑﻌﻤﻖ إﱃ ﻫﺬه اﻟﻐﻴﻮم ودراﺳﺔ اﻟﻨﺠﻮم ﰲ ﻃﻮر اﻟﺘﻜﻮﻳﻦ . ،" ﻳﻮﻟﻴﻮ - ﺃﻏﺴﻄﺲ 2 0 2 3