Free Astronomy Magazine September-October 2023 ARABIC VERSION

T ـ his spectacular picture of the Sh2-284 nebula has been captured in great detail by the VLT Survey Telescope at ESO’s Paranal Observatory. Sh2-284 is a star forma- tion region, and at its centre there is a cluster of young stars, dubbed Dolidze 25. The radi- ation from this cluster is powerful enough to ionise the hydrogen gas in the nebula’s cloud. It is this ionisation that produces its bright orange and red colours. This image is part of the VST Photometric H α Survey of the Southern Galactic Plane and Bulge, led by Janet Drew at the University of Hertfordshire in the UK. [ESO/VPHAS+ team. Ack.: CASU] SEPTEMBER-OCTOBER 2023 ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 33 ﺗـﻢ اﻟﺘﻘـﺎطﻫـﺬﻩ اﻟﺼـﻮرة اﻟﻤﺬﻫﻠـﺔ ﻟﺴـﺪ ﻢ Sh2-284 ﻄﺮ ﻘـــــﺔ راﺋﻌــــــﺔ اﻟﺘﻔﺎﺻـــــﻴﻞ ﺑﻮاﺳــــــﻄﺔ ﺗﻠﺴـــــ ﻮب اﻟﻤﺴــــــﺢ اﻟﻔﻠﻜـﻲ ) ﻓـﻲ إل ﺗـﻲ ( ﻓـﻲﻣﺮﺻـﺪ ﺎراﻧـﺎل اﻟﺘـﺎﺑﻊ ﻟﻠﻤﺮﺻـﺪ اﻷوروﺑــﻲ اﻟـــ ـ . ﺠﻨﻮﺑﻲ Sh2-284 ﻫـــﻲﻣﻨﻄﻘـــﺔ ﺗﺸـــ ﻞ اﻟﻨﺠﻮم وﻳﻮﺟﺪ ﻓ ﻲﻣﺮﻛﺰﻫﺎ ﻋﻨﻘﻮد ﻣﻦ اﻟﻨﺠﻮم اﻟ ﺔ ﺎﻓﻌ ــﮫ اﺳـﻢ ُﻄﻠـﻖﻋﻠ Dolidze 25 واﻹﺷـﻌﺎع اﻟﺼـﺎدر ﻋــﻦ ﻏــﺎزاﻟﻬ ﻫــﺬا اﻟﻌﻨﻘــﻮد ﻗــﻮي ﻤـﺎ ﻜﻔــﻲ ﻟﺘــﺄﻳ ــﺪروﺟ اﻟﻤﻮﺟــﻮد ﻓـــﻲﺳـــﺤﺎ ﺔ اﻟﺴـــﺪ ﻢ وﻫــﺬ ا اﻟﺘـــﺄﻳﻦ ﻫـــﻮ اﻟـــﺬ ـــﺔ واﻟــ ﻨــﺘﺞ أﻟﻮاﻧــﮫ اﻟ ﻘﺎﻟ ـ ـــﺔ ﻤﺮاء اﻟﺰاﻫ . ﻫــﺬﻩ اﻟﺼـــﻮرة ﺟــﺰء ﻣــﻦ ﻣﺴـــﺢ اﻟﻔﻠﻜــﻲ ) ﻓـــﻲ إل ﺗــﻲ ( اﻟﻀــﻮﺋﻲ H α ﻟﻠﻤﺴــﺘﻮىواﻻﻧﺘﻔـــﺎخ اﻟﻤﺠـــﺮي اﻟـــ ـ ﺠﻨﻮﺑﻲ ـــﺖ ـــﺎدة ﺟﺎﻧ ﻘ درو ﻓﻲﺟﺎﻣﻌﺔ ﻫ ﻔﻮردﺷﺎﻳﺮﻓﻲ اﻟﻤﻤﻠﻜﺔ اﻟﻤﺘﺤﺪة . ] ESO/VPHAS+ team. Ack.: CASU [ - ﺳﺒﺘﻤﺒﺮ ﺃﻛﺘﻮﺑﺮ 2 0 2 3