Free Astronomy Magazine September-October 2026 ARABIC VERSION

N Webb studies how planet survived death of its star byNASA/ESA/CSA LauraBetz,BethanyDowner,ChristinePulliam ASA’s James Webb Space Tel- escope is giving us new in- sightintothefar-futureof solar systems like our own, as the agency continues to reveal the se- crets of the universe and our place init.Billionsofyearsago,aSun-like star nearing the end of its life swelledtremendouslyinsizetobe- comearedgiantbeforeejectingits outerlayers,leavingahot,remnant core known as a white dwarf. As a red giant, the star should have en- gulfed and destroyed any nearby planets.Yetastronomershavefound a Jupiter-sized exoplanet orbiting thewhitedwarfevery34hoursata separation of less than 2 million miles (3 million kilometers). Tosolvethemysteryofhowthisex- oplanet survived, an international team of astronomers used NASA’s James Webb Space Telescope to watch the Jupiter-sized exoplanet WD1856btransititshoststar,meas- uringtheplanet’stemperatureand detecting molecules in its atmos- phere.Theyfoundtheplanetissig- SEPTEMBER-OCTOBER2026 ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 48 و ﺐ ﺪرسﻛ ﻒﻧﺠﺎ ﻮﻛﺐ ﻣﻦﻣﻮت ﻧ ﻤﮫ : ﻘﻠﻢ ﺑﻮﻻم ﻟﻮرا ﺑ ، ﺑ ﺜﺎﻧﻲداوﻧﺮ، ﻛﺮﺴﺘ و ﺎﻟﺔ ﻧﺎﺳﺎ / و ﺎﻟﺔ اﻟﻔﻀﺎء اﻷوروﺑ ﺔ / و ﺎﻟﺔ اﻟﻔﻀﺎء اﻟﻜﻨﺪ ﺔ ﻤﻨﺤﻨـﺎ ﺗﻠﺴـﻜﻮب ﺟـﻴ ﻤﺲ وﻳـﺐ اﻟﻔﻀـﺎﺋﻲ اﻟﺘﺎﺑﻊ ﻟﻨﺎﺳﺎ ﻓﻬﻤ ﺎً اً ﺟﺪﻳﺪ ﺴـﺘﻘﺒﻞ اﻷﻧﻈﻤـﺔ ا ﻟﻜﻮﻛﺒﻴﺔ ا ﺸﺎﺑﻬﺔ ﻟﻨﻈﺎﻣﻨﺎ اﻟﺸﻤﴘ ﰲ إﻃﺎر ﻣﻮاﺻﻠﺔ اﻟ ﻮﻛﺎﻟﺔ ﻛﺸﻒ أﴎار اﻟﻜﻮن وﻣﻜﺎﻧﻨﺎ . ﻓﻴﻪ ﻗﺒﻞ ﻣﻠﻴﺎ رات اﻟﺴﻨ ﺗﻤﺪد ﻧﺠـﻢ ﻳﺸـﺒﻪ اﻟﺸﻤﺲ ﻛﺎن ﻳﻘﱰب ﻣﻦ ﻧﻬﺎﻳﺔ ﺣﻴﺎﺗﻪ ﺑﺸﻜﻞ ﻫﺎﺋﻞ ﻟﻴﺼﺒﺢ ﻋﻤﻼﻗ أ ﺎً ﻗ ﺣﻤـﺮ ﺒـﻞ أن ﻳﻘـﺬف ﻃﺒﻘﺎﺗﻪ اﻟﺨﺎرﺟﻴﺔ ﺗﺎرﻛـ ﺎً وراءه ﻟﺒـ ﺎً ﺎً ﺳـﺎﺧﻨ ﺎً ﻣﺘﺒﻘﻴ ﻳﻌﺮف ﺑﺎﺳﻢ اﻟﻘـﺰم اﻷﺑـﻴﺾ وﺧـﻼل ﻣﺮﺣﻠﺔ اﻟﻌﻤﻼق اﻷﺣﻤﺮ ﻛﺎن ﻣﻦ ا ﻔـﱰض أن ﻳﺒﺘﻠﻊ اﻟﻨﺠﻢ أي ﻛ ﻮاﻛﺐ ﻗﺮﻳﺒﺔ ﻣﻨﻪ وﻳﺪﻣﺮﻫﺎ . وﻣﻊ ذﻟﻚ اﻛﺘﺸﻒ ﻋﻠﻤﺎء اﻟﻔﻠﻚ ﻛﻮﻛﺒ ﺎً ﺎً ﺧﺎرﺟﻴ ﺑﺤﺠﻢ ا ﺸﱰي ﻳﺪور ﺣﻮل ﻫﺬا اﻟﻘﺰم اﻷﺑﻴ ﺾ ﻣﺮة ﻛﻞ 34 ﺳﺎﻋﺔ وﻋـﲆ ﻣﺴـﺎﻓﺔ ﺗﻘـﻞ ﻋـﻦ ﻣﻠﻴﻮﻧﻲ ﻣﻴﻞ )3 ﻣﻼﻳ ﻛﻴﻠﻮﻣﱰ .( وﻟﺤﻞ ﻟﻐـﺰ ﻛﻴﻔﻴﺔ ﻧﺠﺎة ﻫﺬا اﻟﻜﻮﻛﺐ اﺳﺘﺨﺪم ﻓﺮﻳﻖ دوﱄ ﻣﻦ ﻋﻠﻤـﺎء اﻟﻔﻠـﻚ ﺗﻠﺴـﻜﻮب ﺟـ ﻴﻤﺲ وﻳـﺐ اﻟﻔﻀﺎﺋﻲ ﺮاﻗﺒﺔ ﻋﺒﻮر اﻟﻜﻮﻛﺐ WD 1856 b أﻣﺎم ﻧﺠﻤﻪ ا ﻀﻴﻒ وﻗﻴـﺎس درﺟـﺔ ﺣـﺮارة اﻟﻜﻮﻛﺐ واﻟﻜﺸﻒ ﻋﻦ اﻟﺠﺰﻳﺌﺎت ا ﻮﺟـﻮدة ﰲ ﻏﻼﻓﻪ اﻟﺠﻮي . وﺟﺪ اﻟﻔﺮﻳﻖ أن اﻟ ﻜﻮﻛﺐ أدﻓﺄ ﺑﻜﺜ ﻣﻤﺎ ﻛـﺎن ﻣﺘﻮﻗﻌ ـﺎً ﻛﻤ ـ ﺎ ﺗﻮﺻـﻞ إﱃ اﻟﺘﻔﺴ ـ اﻷﻛﺜ ـﺮ ﺗﺮﺟﻴﺤ ﺎً ﻟﻜﻴﻔﻴﺔ وﺻـﻮﻟﻪ إﱃ ﻣـﺪاره اﻟﻀـﻴﻖ ﻟﻠﻐﺎﻳﺔ ﺣـﻮل اﻟﻘـﺰم اﻷﺑـﻴﺾ . وﻗـﺪ ﻧُﴩـت - ﺳﺒﺘﻤﺒﺮ ﺃﻛﺘﻮﺑﺮ 2 0 2 6