Free Astronomy Magazine July-August 2022 ARABIC VERSION

A n international astronomer team has discovered the most distant galaxy candi- date to date, named HD1, which is about 13.5 billion light-years away. This discovery implies that bright sys- tems like HD1 existed as early as 300 million years after the Big Bang. This galaxy candidate is one of the James Webb Space Telescope (JWST) tar- gets launched late last year. If obser- vations with the JWST confirm its exact distance, HD1 will be the most distant galaxy ever recorded. T most distant galaxy candidate hree-color image of HD1, the to date, created using data from the VISTA telescope. The red object in the center of the zoom-in image is HD1. [Harikane et al.] اﻛﺘﺸـــــــــــــــــﺎف أ ﻌــــــــــــــــــﺪ ﻣﺠــــــــــــــــــﺮة أﻻن ﻣﺮﺷﺤﺔﺣ اﻛﺘﺸﻒ ﻓﺮﻳﻖ ﻓﻠﲄ دوﱄ أﻛـﱶ اﳌﺠـﺮات اﳌﺮﺷـﺤﺔ ﺑﻌـﺪًا ﺣـﱴ اﻵن ، وﻫـﻲ HD1 ، واﻟـﱵ ﺗﺒﻌـﺪ ﺣـﻮاﱄ ١٣.٥ ﻣﻠﻴـﺎر ﺳـﻨﺔ ﺿـﻮﺋﻴﺔ . ﻳﺸـﲑ ﻫـﺬا اﻻﻛﺘﺸـﺎف إﱃ أن اﻷﻧﻈﻤــﺔ اﻟﺴــﺎﻃﻌﺔ ﻣﺜــﻞ HD1 ﻛﺎﻧــﺖ ﻣﻮﺟـــﻮدة ﻣﻨـــﺬ ٣٠٠ ﻣﻠﻴـــﻮن ﺳـــﻨﺔ ﺑﻌـــﺪ اﻻﻧﻔﺠـــﺎر اﻟﻌﻈﻴﻢ . ﻫﺬه اﳌﺠﺮة . اﻟﻌﻈﻴﻢ . ﻫﺬه اﳌﺠﺮة اﳌﺮﺷﺤﺔ ﻫﻲ واﺣﺪة ﻣﻦ أﻫﺪاف ﺗﻠﺴﻜﻮب ﺟﻴﻤ ﺲ وﻳﺐ اﻟﻔﻀﺎﰄ اﻟﱵ ﰎ أواﺧﺮ اﻟﻌﺎم اﳌﺎﴈ إﻃﻼﻗﻬﺎ . إذا أﻛﺪت اﻷرﺻﺎد ﺑﺎﺳﺘﺨﺪام وﻳﺐ اﳌﺴﺎﻓﺔ اﻟﺪﻗﻴﻘﺔ ﻟﻬﺎ ، ﻓﺴﺘﻜﻮن HD1 ﻫﻲ أﺑﻌﺪ ﳎﺮة ﻳ ﺘﻢ ﺗﺴﺠﻴﻠﻬﺎ ﻋﲆ اﻹﻃﻼق ﺑﺑﺑﺑب ـﺔ اﻷﻟـﻮان ﻟــ ﺻـﻮرة ﺛﻼﺛ HD1 ، اﻟﻤﺠـﺮة اﻷﻛـ اﻵن ، ﺗـــــــــﻢ إﻧﺸـــــــــﺎؤﻫﺎ ﻌـــــــــﺪًا ﻣﺮﺷـــــــــﺤًﺎ ﺣـــــــــ ﺎﺳــﺘﺨﺪام ﺑ ﺎﻧـــﺎت ﻣـــﻦ ﺗﻠﺴـــ ﻮب VISTA. ا ﺴﻢ اﻷ ﻤﺮﻓﻲوﺳﻂاﻟﺼﻮرة اﻟﻤﻜـ ة ﻫﻲ اﻟﻤﺠﺮة HD1 [Harikane t al.] ﺎر ﺮا ﻓ ﺮا ﻣﺮﺻﺪ أﺗﺎ ﺎﻣﺎ اﻟﻤﻠ ﻤ ي اﻟﻜﺒ ( أﻟﻤﺎ ) ﻣﺠﻠﺔ Astronomy ﺎﻟﻌﺮ ﺔ ٤٦