Free Astronomy Magazine July-August 2024 ARABIC VERSION

A DECam spies cometary globule reaching for the stars by NOIRLab − Josie Fenske bout 1300 light-years away, in the constellation Puppis, a ghostly hand appears to be emerging from the interstellar medium and reaching out into the cosmos. This cloudy, ominous struc- ture is CG 4, a cometary globule that has been given the nickname ‘God’s Hand’. CG 4 is one of many cometary globules present within the Milky Way, and how these objects get their distinctive form is still a matter of debate among astronomers. JULY-AUGUST 2024 ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 50 " ﺎم د ﺗﺮاﻗﺐ " ﻛﺮة ﻣﺬﻧﺒ ﺔ ﺑﺤﺜﺎً ﻋﻦ اﻟﻨﺠﻮم : ﻘﻠﻢ ﺟﻮزيﻓ ﻨﺴﻜﻲ – ﻣﺨﺘ ﻧﻮﻳﺮﻻب ﺗﻈﻬـﺮ ﻳﺪ ﺷﺒﺤﻴﺔ ﻛﻮﻧﻴﺔ ﻋﲆ ﻣﺴﺎﻓﺔ ﺗﺒﻠﻎ ﺣﻮاﱄ 1300 ﺳﻨﺔ ﺿﻮﺋﻴﺔ ﰲ ﻛﻮﻛﺒﺔ اﻟﻜﻮﺛـﻞ ﺗﱪز ﻣـﻦ اﻟﻮﺳـﻂ ﺑـ اﻟﻨﺠـﻮم وﺗﻤﺘـﺪ إﱃ اﻟﻜﻮن . ﻫﺬا اﻟﻬﻴﻜﻞ اﻟﻀﺒﺎﺑﻲ ﻳﺴـﻤﻰ CG4 وﻫﻲ ﻋﺒـﺎرة ﻋـﻦ ﻛـﺮة ﻣﺬﻧﺒﻴـﺔ ﺗﻌـﺪ أﺣـﺪ ﻋﺠﺎﺋﺐ اﻟﻜﻮن . CG4 ﻫﻲ واﺣﺪة ﻣﻦ اﻟﻌﺪﻳﺪ اﻟﻜﺮات ﻣﻦ ا ﺬﻧﺒﻴﺔ ا ﻮﺟﻮدة داﺧﻞ ﻣﺠـﺮة درب اﻟﺘﺒﺎﻧﺔ وﻻ ﺗﺰال ﻛﻴﻔﻴﺔ ﺣﺼـﻮل ﻫـﺬه اﻷﺟﺴﺎم ﻋﲆ ﺷﻜﻠﻬﺎ ا ﻤﻴﺰ ﻣﻮﺿﻊ ﻧﻘـﺎش ﻃﻮﻳﻞ ﺑ ﻋﻠﻤﺎء اﻟﻔﻠﻚ . ﻳﻮﺿـــﺢ ــــﻞ ﻫـــﺬا اﻟﻬﻴ اﻟﻀــــ ﺎﺑﻲ أن CG4 ــــﺎرة ﻋـــﻦ ﻋ ــــﺔ ﺿــــﻤﻦ ﻛــــﺮة ﻣﺬﻧﺒ ـــﺪ ﻣــــﻦ اﻟﻌﺪ اﻟﻜــــﺮات ا ــــﺔ ﻟﻤﺬﻧﺒ اﻟﻤﻮﺟﻮدة داﺧﻞ ﻣﺠﺮة در اﻟﺘ ﺎﻧﺔ وﻻ ﺗﺰال ﻛ ﻔ ﺔ ﺣ ﺼـﻮل ﻫـﺬﻩ اﻷﺟﺴـﺎم ﻋﻠـﻰﺷـ ﻠﻬﺎ اﻟﻤﻤـ ﻣﻮﺿـﻊ ﻋﻠﻤﺎء اﻟﻔﻠﻚ ﻧﻘﺎش ﺑ . ﺗﻢ اﻟﺘﻘﺎطﻫﺬﻩ اﻟﺼﻮرة ﺑﻮاﺳﻄﺔ ﺎﻣ ا اﻟﻄﺎﻗﺔ اﻟﻤﻈﻠﻤﺔ اﻟﻤ ﺼـﻨﻌﺔ ﻣـﻦ ﻗﺒـﻞ وزارة اﻟﻄﺎﻗـﺔ ـﺔ اﻷﻣﺮ ﻜ واﻟﻤﺘﺼــﻠﺔ ﺘﻠﺴـ ﻮب ــﻮ ﻓ ﻜﺘـﻮرإم ﻼﻧ ـﺎﻟﻎ ﻗﻄـﺮﻩ اﻟ 4 أﻣﺘــﺎر ﻓـﻲﻣﺮﺻـﺪ ﺳــ و ﺗﻮﻟﻮﻟــــﻮ أﺣــــﺪ ﺑــــﺮاﻣﺞ ﻣﺨﺘــــ ﻧــــﻮﻳﺮﻻ اﻟﺘــــﺎﺑﻊ ﻣﺆﺳ ــــﺔ ــــﺔ اﻷﻣﺮ ﻜ ﺴــــﺔ اﻟﻌﻠــــﻮم اﻟﻮﻃﻨ . ــــﺖ ﻣــــﻦ اﻟﺼــــﻌﺐ ﺗﻔﻮ ﺗﺼـﻨﻒ اﻟﻤـ ات اﻟــ CG4 ﻋﻠــﻰ أﻧﻬـﺎ ـﺔ ﻛــﺮة ﻣﺬﻧﺒ ﺎ ﺸـ ﮫ رأﺳـﻬ اﻟﻤﻐــ وذ ﻠﻬـ ﺎ اﻟﻄﻮﻳـﻞ اﻟـ ـ ﺨﺎﻓﺖ ﺸـ ﻞ ﻏﺎﻣﺾﻣﻈﻬﺮ اﻟﻤﺬﻧﺐ ﻋﻠﻰ اﻟﺮﻏﻢ ﻣﻦ ﻋﺪم وﺟﻮد أيﺷﻲء ﻣﺸ ك ﺑ ﻨﻬ . ﻤﺎ ﻔ ضﻋﻠﻤﺎء اﻟﻔﻠـﻚ أن اﻟﻜﺮ ات اﻟﻤﺬﻧﺒ ﺔ ﺗﺴﺘﻤﺪ ﻨ ﺘﻬﺎ ﻣﻦ اﻟﺮ ﺎح اﻟﻨ ﻤ ﺔ ﻟﻠﻨﺠﻮم اﻟﻀ ﻤﺔ اﻟﺴﺎﺧﻨﺔ اﻟﻘﺮ ﺔ . ] CTIO/NOIRLab/DOE/NSF/AURA. Image Processing: T.A. Rector (University of Alaska Anchorage/NSF’s NOIRLab), D. deMartin &M. Zamani (NSF’s NOIRLab [( - ﻳﻮﻟﻴﻮ ﺃﻏﺴﻄﺲ 2 0 2 4