Free Astronomy Magazine January-February 2026 ARABIC VERSION

JANUARY-FEBRUARY2026 First-ever detection of “heavy water” in a planet-forming disk byNRAO he discovery of ancient water in a planet- formingdiskrevealsthatsomeofthewaterfo undincom- ets—andmaybeevenEarth— isolderthan thedisk’sstaritself,offeringbreakthrough T أول رﺻﺪ ﻟﻠﻤﺎء اﻟﺜﻘﻴﻞ ﻓﻲ ﻗﺮصﺗ ﻮن اﻟ ﻮاﻛﺐ : ﻘﻠﻢ اﻟ ﻟﻌﻠﻢ اﻟﻔﻠﻚ اﻟﺮادﻳﻮي ﻤﺮﺻﺪ اﻟﻮﻃ اﻛﺘ ﺸـﺎف ا ﺎء اﻟﻘﺪﻳﻢ ﰲ ﻗـﺮص ﺗﻜـﻮﱡ ن اﻟﻜﻮاﻛـﺐ ﻳﻜﺸﻒ أن ﺑﻌﺾ ا ﺎء ا ﻮﺟـﻮد ﰲ ا ـﺬﻧﺒﺎت ورﺑﻤـﺎ ﺣﺘﻰ ﻋﲆ اﻷرض أﻗﺪم ﻣﻦ ﻧﺠﻢ اﻟﻘﺮص ﻧﻔﺴﻪ ﻣﻤـﺎ ﻳـﻮﻓﺮ رؤى راﺋـﺪة ﺣـﻮل ﺗـﺎرﻳﺦ ا ـﺎء ﰲ ﻧﻈﺎﻣﻨـﺎ اﻟﺸﻤﴘ . اﺳـﺘﺨﺪم اﻟﻔﻠﻜﻴـﻮن ﻣﺼـﻔﻮﻓﺔ أﺗﺎﻛﺎﻣـﺎ اﻟﻜﺒ ة ﻟﻠﻤﻠﻴﻤﱰ / ﺗﺤﺖ ا ﻠﻴﻤﱰ ) ALMA ( ﻟﺮﺻﺪ أول ₂ اﻟﺼﻮرة اﻟﺘﺨ ﻠ ﺔ أﻋـﻼﻩ ﺗﻮﺿـﺢ ﺗﻄـﻮرﺟﺰ ﺌـﺎت اﻟﻤـﺎء اﻟﺜﻘﻴـﻞ )H₂O ، HDO ، و D₂O ( رﺻـﺪت ﻤـﺎ ﻓــﻲ اﻟﺴـــﺤﺐ اﻟـــ ـ ﺠﺰ ﺌ ﺔ اﻟﻌﻤﻼﻗـــﺔ ـــﺔ ـــﻮن اﻟ ﻮاﻛـــﺐ واﻟﻤـــﺬﻧ ﺎت ﻗﺒــﻞ أن ﺗﺼـــﻞ ﻓـــﻲ ﻧﻬﺎ وﻗــﺮص ﺗ اﻟﻤﻄﺎف إﻟﻰ اﻷرض . [NSF/AUI/NSF NRAO/P. Vosteen, B. Saxton] - ﻳﻨﺎﻳﺮ ﻓﺒﺮﺍﻳﺮ 2 0 2 6