Free Astronomy Magazine November-December 2025 ARABIC VERSION

Webb narrows atmospheric possibilities for TRAPPIST-1 d byNASA/ESA/CSA LauraBetz,HannahBraun heexoplanetTRAPPIST-1din- trigues astronomers looking forpossiblyhabitableworlds beyond our solar system because itis similar in size to Earth, rocky, and resides in an area around its star where liquid water on its surface is theoretically possible. But according toanewstudyusingdatafrom NASA’s James Webb Space Tele- scope, it does not have an Earth-like atmosphere. “Ultimately, we want to know if something like the envi- ronmentweenjoyonEarthcanexist elsewhere, and under what condi- tions. While NASA’s James Webb SpaceTelescopeisgivingustheabil- itytoexplorethisquestioninEarth- sized planets for the first time, at thispointwecanruleoutTRAPPIST- 1 d from a list of potential Earth twins or cousins,” said Caroline Pi- aulet- Ghorayeb of the University of ChicagoandTrottierInstituteforRe- search on Exoplanets (IREx) at Uni- versité de Montréal, lead author of the study published in The Astro- physicalJournal.TheTRAPPIST-1sys- tem is located 40 light-years away and was revealed as the record- holder for most Earth-sized rocky planets around a single star in 2017, thanks to data from NASA’s retired Spitzer Space Telescope and other observatories.Duetothatstarbeing a dim, relatively cold red dwarf, the “habitable zone” or “Goldilocks zone” lies much closer to the star than in our solar system. NOVEMBER-DECEMBER2025 و ﺐ ﻳﺤﺪد ﻣﻼﻣﺢ اﻟﻐﻼف اﻟـﺠﻮي ﻟـ ﻠ ﻮﻛﺐ ﺗﺮاﺑ ﺴﺖ -1d : ﻘﻠﻢ ﻟﻮرا ﺑ و ﻫﺎﻧﺎ ﺑﺮاون و ﺎﻟﺔ ﻧﺎﺳﺎ / و ﺎﻟﺔ اﻟﻔﻀﺎء اﻷوروﺑ ﺔ و ﺎﻟﺔ اﻟﻔﻀﺎء اﻟﻜﻨﺪ ﺔ ﺜـ اﻟ ﻜﻮﻛﺐ ﺗﺮاﺑﻴﺴﺖ - 1b اﻟﺨـﺎرﺟﻲ ﺣـ ة ﻋﻠﻤﺎء اﻟﻔﻠﻚ اﻟﺒـﺎﺣﺜ ﻋـﻦ ﻋـﻮاﻟﻢ ﺻـﺎﻟﺤﺔ ﻟﻠﺴﻜﻦ ﺧﺎرج ﻧﻈﺎﻣﻨـﺎ اﻟـ ﺸﻤﴘـ إذ ﻳﺸـﺒﻪ اﻷرض اﻟ ﻣﻦ ﺣﻴﺚ ﺤﺠﻢ وﻫﻮ ﺻﺨﺮي وﻳﻘـﻊ ﰲ ﻣﻨﻄﻘﺔ ﺣﻮل ﻧﺠﻤﻪ ﺣﻴـﺚ ﻳ ﻤﻜـﻦ ﻧﻈ ﺮﻳـﺎً وﺟﻮد ا ﺎء اﻟﺴﺎﺋﻞ ﻋـﲆ ﺳـﻄﺤﻪ وﻣـﻊ ذﻟـﻚ ﺎً وﻓﻘ ﻟﺪراﺳﺔ ﺟﺪﻳﺪة ﺑﺎﺳﺘﺨﺪام ﺑﻴﺎﻧـﺎت ﻣـﻦ ﺗﻠﺴـﻜﻮب ﺟـﻴﻤﺲ وﻳـﺐ اﻟﻔﻀـﺎﺋﻲ اﻟﺘـﺎﺑﻊ ﻟﻮﻛﺎﻟﺔ ﻟﻨﺎﺳﺎ ﻓﺈﻧﻪ ﻻ ﻳﻤﺘﻠﻚ ﻏﻼﻓًﺎ ﺟﻮﻳًﺎ ﻳُﺸﺒﻪ ﻟﻮﻛﺎﻟﺔ ﻧﺎﺳﺎ ﻓﺈﻧﻪ ﻻ ﻳﻤﺘﻠﻚ ﻏﻼ ﻓًﺎً ﺒﻪ ﺸﻳ ﺎً ﺟﻮﻳ ﻏﻼف اﻷرض اﻟﺠﻮي ﻗﺎﻟﺖ . ﻛﺎروﻟ ﺑﻴﻮﻟﻴﺖ - ﻏﺮﻳﺐ ﻣﻦ ﺟﺎﻣﻌﺔ ﺷﻴﻜﺎﻏﻮ وﻣﻌﻬﺪ ﺗﺮوﺗﻴﻴـﻪ ﻷﺑﺤﺎث اﻟﻜﻮاﻛﺐ اﻟﺨ ﺎرﺟﻴﺔ ﺑﺠﺎﻣﻌﺔ ﻣﻮﻧﱰﻳﺎل وا ﺆﻟﻔﺔ اﻟﺮﺋﻴﺴﻴﺔ ﻟﻠﺪراﺳﺔ ا ﻨﺸﻮرة ﰲ ﻣﺠﻠﺔ اﻟﻔﻴﺰﻳﺎء اﻟﻔﻠﻜﻴ :" ﺔ ﻬﺎﻳﺔ ﰲ اﻟﻨ ﻧﺮﻳﺪ أن ﻧﻌـﺮف ﻣﺎ إذا ﻛﺎن ﻫﻨﺎك ﺑﻴﺌﺔ ﻣﺸﺎ ﺑﻬﺔ ﻟﺒﻴﺌـﺔ اﻷرض اﻟﺘﻲ ﻧﺴﺘﻤﺘﻊ ﺑﻬﺎ وﰲ أي ﻇﺮوف وﺑﻴﻨﻤﺎ ﻳ ﺘﻴﺢ ﻟﻨﺎ ﺗﻠﺴﻜﻮب ﺟﻴﻤﺲ وﻳﺐ اﻟﻔﻀـﺎﺋﻲ اﻟﺘـﺎﺑﻊ ﻟﻨﺎﺳﺎ اﺳﺘﻜﺸـﺎف ﻫـﺬا اﻟﺴـﺆال ﰲ ﻛﻮاﻛـﺐ ﻟﻨــﺎ ﺗﻠﺴــﻜﻮب ﺟــﻴﻤﺲ وﻳــﺐ اﻟﻔﻀــﺎﺋﻲ اﺳﺘﻜﺸﺎف ﻫـﺬا اﻟﺴـ ﺆ ال ﰲ ﻛﻮاﻛـﺐ ﺑﺤﺠـﻢ اﻷرضﻷول ﻣ ــﺮة ﻳﻤﻜﻨﻨ ــﺎ اﻵن اﺳــﺘﺒﻌﺎد ﺗﺮاﺑﻴﺴﺖ - 1b ﻣﻦ ﻗﺎﺋﻤﺔ ﺗﻮاﺋﻢ اﻷرض أو أﺑﻨﺎء ﻋﻤﻮﻣﺘﻬﺎ ا ﺤﺘﻤﻠ " . ﻧﻈـﺎم ﺗﺮاﺑﻴﺴـﺖ - 1b ﻳﻘﻊ ﻋﲆ ﻣﺴﺎﻓﺔ 40 ﺳﻨﺔ ﺿﻮﺋﻴﺔ وﻗﺪ ﻛُﺸﻒ ﻋﻨﻪ ﻋﺎم 2017 وﻫﻮ ﺣﺎﻣﻞ اﻟـﺮﻗﻢ اﻟﻘﻴـﺎﳼ ﻷﻛﱪ ﻋﺪد ﻣﻦ اﻟﻜﻮاﻛﺐ اﻟﺼﺨﺮﻳﺔ اﻟﺘﻲ ﺗﺪور اﻟﻜﻮاﻛﺐ ا ﻠﻘﺐ ﺑﺎﻟﺤﺎدث ﺰﻳﺠﻪ اﻟﻔﺮﻳﺪ ﻣﻦ ﻧﻮﻓﻤﺒﺮ - ﻳﺴﻤﺒﺮ ﺩ 2 0 2 5