Free Astronomy Magazine November-December 2025 ARABIC VERSION

Magnetic fields thread TW Hydrae’s proto planetarydisk byNationalRadioAstronomyObservatory stronomershavecreateda detailedmaprevealingthe magnetic fields weavingthrough TW Hydrae, one of the clos- est known stars with a planet-form- ing disk, using the Atacama LargeMillimeter/submillimeterArray( AL- MA). Led by Dr. Richard Teague at MIT, this new research sheds light ontheinvisibleforcesshapingnew planets,likethosethatformedour own solar system over 4.5 billion years ago. Planets originate in swirl- ingdisksofgasanddustthatencir- cle young stars. While telescopes have revealed the shapes and gaps inthesedisks,scientistshavestrug- gled to measure magnetic fields, the unseen agents that guide and sculpt planet-forming material. Magneticfieldsarewidelythought NOVEMBER-DECEMBER2025 اﻟـﺤﻘﻮل اﻟﻤﻐﻨﺎﻃ ﺴ ﺔ ﺗﺨﺮقﻗﺮص TWHydrae اﻷ اﻟ ﻮﻛ وﻟﻲ ا: ﻘﻠﻢ ﻟﻌﻠﻢ اﻟﻔﻠﻚ اﻟﺮادﻳﻮي ﻟﻤﺮﺻﺪ اﻟﻮﻃ أﻧﺸـﺄ ﻋﻠﻤﺎء اﻟﻔ ﻠﻚ ﺧﺮﻳﻄﺔ ﺗﻔﺼﻴﻠﻴﺔ ﺗﻜﺸـﻒ ﻋﻦ ا ﺠﺎﻻت ا ﻐﻨﺎﻃﻴﺴـﻴﺔ ا ﺘﺸـﺎﺑﻜﺔ ﺣـﻮل اﻟ ﻨﺠﻢ TW Hydrae وﻫﻮ أﺣﺪ أﻗﺮب اﻟﻨﺠـﻮم ا ﻌﺮوﻓﺔ اﻟﺘﻲ ﺗﻤﺘﻠﻚ ﻗﺮﺻ ﺎً ﻟﺘﻜﻮﻳﻦ اﻟﻜﻮاﻛـﺐ وذﻟﻚ ﺑﺎﺳﺘﺨﺪام ﻣﺼﻔﻮﻓﺔ أﺗﺎﻛﺎﻣﺎ ا ﻠﻴﻤﱰﻳـﺔ اﻟﻜﺒ ة وﺗﺤـﺖ ا ﻠﻴﻤﱰﻳـﺔ أ ـﺎ ) .( ﻗـﺎد ﻫـﺬا اﻟﺒﺤ ــﺚ ﻣ ــﻦ ﻣﻌﻬ ــﺪ ﻣﺎﺳﺎﺗﺸﻮﺳ ــﺘﺲ ﻟﻠﺘﻜﻨﻮﻟﻮﺟﻴـﺎ )MIT (، اﻟﻀـﻮء ﻋـﲆ اﻟﻘـﻮى اﻟﺨﻔﻴﺔ اﻟﺘﻲ ﺗُﺸﻜﻞ اﻟﻜﻮاﻛﺐ اﻟﺠﺪﻳـﺪة، ﻣﺜـﻞ اﻟﺒﺤﺚ اﻟـﺪﻛﺘﻮر رﻳﺘﺸـﺎرد ﺗـﻴﺞ ﻣـﻦ ﻣﻌﻬـﺪ ﻣﺎﺳﺎﺗﺸﻮﺳــﺘﺲ ﻟﻠﺘﻜﻨﻮﻟﻮﺟﻴ ـﺎ وﻗ ـﺪ اﻟﻘ ـﻰ اﻟﻀـﻮء ﻋـﲆ اﻟﻘـﻮى اﻟﺨﻔ ﻴــﺔ اﻟﺘـﻲ ﺗﺸـﻜﻞ اﻟﻜﻮاﻛﺐ اﻟﻔﺘﻴـﺔ وﻫـﻲ ﻧﻔـﺲ اﻟﻘـﻮى اﻟﺘـﻲ ﺳﺎﻫﻤﺖ ﰲ ﺗﺸﻜﻞ ﻧﻈﺎﻣﻨﺎ اﻟﺸﻤﴘ ﻗﺒﻞ اﻛﺜﺮ ﻣﻦ 4.5 ﻣﻠﻴﺎر ﺳﻨﺔ . ﺗﺘﺸﻜﻞ اﻟﻜﻮاﻛـﺐ داﺧـﻞ اﻗﺮاص اﻟﻀﻮء ﺗﺤﺖ اﻷﺣﻤﺮ اﻟـﺬي ﻳﻜﺘﺸـﻔﻪ وﻳﺐ ﻗﺎدر ﻋﲆ ا ـﺮور ﻋـﱪ ﺑﻌـﺾ اﻟﺴـﺤﺐ اﻟﺴﻤﻴﻜﺔ ﰲ ا ﻨﻄﻘـﺔ ﻟﻴﻜﺸـﻒ ﻋـﻦ اﻟﻨﺠـﻮم داﺧﻞ اﻗﺮاص دواﻣﻴﺔ ﻣﻦ اﻟﻐﺎز واﻟﻐﺒﺎر ﺗُﺤﻴﻂ ﺑــﺎﻟﻨﺠﻮم ﺣﺪﻳﺜــﺔ اﻟــﻮﻻدة وﻗــﺪ ﻛﺸــﻔﺖ اﻟﺘﻠﺴﻜﻮﺑﺎت ﻋﻦ اﻟﺒﻨﻰ ا ﺪﻫﺸﺔ واﻟﻔﺠﻮات ﰲ ﺗﻠـــﻚ اﻷﻗــﺮاص اﻻ ان ﻗﻴـــﺎس ا ﺠــﺎﻻت ا ﻐﻨﺎﻃ ﻴﺴﻴﺔ ﻇﻞ ﺗﺤﺪﻳﺎً ﺻﻌﺒﺎً ﻟﻌﻠﻤﺎء اﻟﻔﻠـﻚ ﻧﻈـﺮاً ﻻﻧﻬـﺎ ﻏـ ﻣﺮﺋﻴـﺔ ﻣﺒـﺎﴍة . ﻳﻌﺘﻘـﺪ ا ﻐﻨﺎﻃﻴﺴﻴﺔ ﺗﻠﻌـﺐ دورًا ﺣﺎﺳـﻤًﺎ ﰲ ﻛﻴﻔﻴـﺔ ﺗﻄﻮر اﻷﻗﺮاص وإﻧﺸﺎء اﻟﻜﻮاﻛﺐ، وﻟﻜﻦ ﺣﺘﻰ ﻧﻮﻓﻤﺒﺮ - ﺩﻳﺴﻤﺒﺮ 2 0 2 5