Free Astronomy Magazine September-October 2026 ARABIC VERSION

SEPTEMBER-OCTOBER2026 35 same planet using the James Webb Space Te- lescope(JWST),afacil- ity of the US, European and Canadian space agencies. Their results are also published in TheAstrophysicalJour- nal Letters . To confirm a planet’s discoveryfromadetec- tion, astronomers usu- ally have to make fol- low-up observations. However, this system had been extensively studied, with several images stored in the ESO and JWST science archives. “To our joy, out it popped in previ- ous SPHERE observa- tions,” says Birkby, referring to anotherVLT instrument previ-ously used to observe the Beta Pictoris sys-tem. The planet was also spotted in archival observations from NIR- Cam, a JWST instru- ment. Now that theteam knew where to lookfor the potential new planet, “itturnsoutit was hiding in the data allalong!” saysBirkby. Co-author Valentin Christiaens, re- searcheratCEAParis-Saclay,France, adds: “The detections in the ar- chival SPHERE data are not onlyvery exciting on their own, but also because they suggest a number of treasures are still hidden in the archives of VLT instruments!” Beta Pictoris is now the second sys- tem, after HR 8799, where more than two planets have been directly imaged. “Systems with multiple di- rectly imaged exoplanets are the ‘holygrails’ofdiscoveries,because they can teach us a lot about what different exoplanets are like in the same formation environment,” says Sutlieff. Beta Pictoris d also clearsupamysteryinitsplanetarysyste m, as it has exactly the right mass and position to explain the particular shape of the surrounding debrisdisc,madeoftheleftoversofplan et formation. The discovery of Beta Pictoris d in this way encourages further direct imagingofplanetarysystemswhere faintplanetsmayhavebeenhiding in plain sight, including with ESO’s upcoming Extremely Large Tele- scope (ELT). “Planets seem to have friends,” says Beth Biller, also a co-author of the paper and astronomer at the Uni- versity of Edinburgh, “many of the famous directly imaged exoplanet systems seem to have multiple giant planets in the same system, and likely there are even more lower mass planets hiding in these systems thatmightberevealedwithinstru- mentsontheELT.”  https://www.youtube.com/watch?v=SeU_tE6yaz8 ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 35 اﻛﺘﺸﻒ ﻋﻠﻤﺎء اﻟﻔﻠﻚ ﻮﻛ ﺎً ﺛﺎﻟﺜ ﺎً ـﺪورﺣـﻮل اﻟـﻨ ﻢ ﺑ ﺘـﺎ ﺑ ﻜﺘـﻮرﺲ ﺎﺳـﺘﺨﺪام اﻟ ﺘﻠﺴـ ﻮب اﻟﻜﺒـ ﺟـﺪ ﻌـﺪ . اً اﻟ ﻮﻛـﺐ اﻟـ ـ ﺠﺪ ﺪ " ﺑ ﺘـﺎ ﺑ ﻜﺘــﻮرﺲد " أﺧــﻒ اﻟ ﻮاﻛــﺐ اﻟــ ﻣــﻦ ﺑــ ـ ﺗــﻢ ﺗﺼـﻮﻳﺮﻫ ﺨﺎرﺟ ﺔ اﻟــ ﺎ ﻣــﻦ اﻷرض . ﻌــﺪ اﻻﻛﺘﺸــﺎف اﻷوﻟــﻲوﺟــﺪ ا ﻟﻔﺮ ـﻖ أﻧــﮫ ﺎن ﻣﺨ ﺎً ﻔﺘ ﻓﻲ أرﺷ ﻔﺎت رﺻﺪ ﺗﻤﺘﺪ ﻷﻛ ﻣﻦ ﻋﻘﺪ . ﻠﺨﺺﻫﺬا اﻟﻔ ﺪﻳﻮ اﻟﺪراﺳﺔ . [ESO. Music: Stellardrone − To The Great Beyond. Written by: E. Elkington. Footage and photos:ESO, L. Calçada, M. Kornmesser, C. Malin, P. Horálek] اﻟﻔﻠﻜﻴﺔ وﻟﻠﺘﺄﻛﺪ ﻣﻦ اﻛﺘﺸﺎف ﻛﻮﻛ ـﺐ اﺳـﺘﻨﺎد اً إﱃ ﻋﻤﻠﻴ ـﺔ رﺻﺪ أوﻟﻴﺔ ﻳﺘﻌ ﻋﲆ ﻋﻠﻤـﺎء اﻟﻔﻠﻚ ﻋـﺎدةً اﻟﻘﻴـﺎم ﺑـ ﺈﺟﺮاء أرﺻﺎد ﻣﺘﺎﺑﻌﺔ . إﻻ أن ﻫﺬا اﻟﻨﻈـﺎم ﻛـﺎن ﻗـﺪ ﺧﻀﻊ ﻟﺪراﺳﺎت ﻣﻜﺜﻔﺔ ﻣـﻊ ﺗ ﺨﺰﻳﻦ اﻟﻌﺪﻳﺪ ﻣﻦ ﺻـﻮره ﰲ اﻷرﺷﻴﻔﺎت اﻟﻌﻠﻤﻴـﺔ اﻟﺘﺎﺑﻌـﺔ ﻟﻜﻞ ﻣـﻦ ا ﺮﺻـﺪ اﻷوروﺑـﻲ اﻟﺠﻨﻮﺑﻲ وﺗﻠﺴﻜﻮب ﺟـﻴﻤﺲ وﻳﺐ اﻟﻔﻀﺎﺋﻲ . ﻗﺎﻟـــﺖ ﺟـــ ﺑ ﻛﺒـــﻲ : » وﻟﺴﻌﺎدﺗﻨﺎ ﻇﻬﺮ اﻟﻜﻮﻛﺐ ﰲ أرﺻﺎد ﺳـﺎﺑﻘﺔ أﺟﺮﺗﻬـﺎ أداة « ﺳــﻔ ﰲ إﺷــﺎرة إﱃ أداة أﺧﺮى ﻋﲆ اﻟﺘﻠﺴﻜﻮب اﻟﻜﺒـ اً ﺟﺪ اﺳﺘﺨﺪﻣﺖ ﺳﺎﺑﻘ ﺎً ﻟﺮﺻﺪ ﻧﻈﺎم ﺑﻴﺘ ﺎ ﺑﻴﻜﺘﻮرﻳﺲ . ﻛﻤﺎ ﻇﻬﺮ اﻟﻜﻮﻛـﺐ أﻳﻀـ ﰲ ﺎً أرﺻﺎد أرﺷـﻴﻔﻴﺔ اﻟﺘﻘﻄﺘﻬـﺎ أداة ﻧ ﻛ ــﺎم ﻋ ــﲆ ﻣـــﺘﻦ ﺗﻠﺴــﻜﻮب ﺟــﻴﻤﺲ وﻳــﺐ اﻟﻔﻀﺎﺋﻲ . أﺿـﺎﻓﺖ ﺑ ﻛﺒـﻲ : » وﺑﻤﺠﺮد أن ﻋـﺮف اﻟﻔﺮﻳـﻖ أﻳــ ﻦ ﻳﻨﺒﻐــﻲ اﻟﺒﺤــﺚ ﻋــﻦ اﻟﻜﻮﻛﺐ ا ﺤﺘﻤﻞ اﺗﻀـﺢ أﻧـﻪ ﻛﺎن ﻣﺨﺘﺒﺌ ﺎً ﰲ اﻟﺒﻴﺎﻧﺎت ﻃﻮال اﻟﻮﻗ ـﺖ ! « وأﺿـﺎف ﻓ ـﺎﻟﻨﺘ ﻛﺮﻳﺴﺘﻴﺎﻧﺲ ا ﺆﻟﻒ ا ﺸﺎرك اﻟﺪراﺳــــﺔ واﻟﺒﺎﺣــــﺚ ﰲ ﻣﻔﻮﺿ ـﻴﺔ اﻟﻄﺎﻗ ـﺔ اﻟﺬرﻳــﺔ واﻟﻄﺎﻗﺎت اﻟﺒﺪﻳﻠـﺔ ﺑﻔﺮﻧﺴـﺎ : ـﺎت اﻟﺒﺪﻳﻠــﺔ ﺑﻔﺮﻧﺴــﺎ :» إن ﻋﻤﻠﻴـﺎت اﻟﺮﺻﺪ ﰲ ﺑﻴﺎﻧـﺎت ﺟﻬـﺎز ﺳـﻔ اﻷرﺷـﻴﻔﻴﺔ ﻟﻴﺴﺖ ﻣﺜ ة ﻟﻠﻐﺎﻳﺔ ﺑﺤﺪ ذاﺗﻬﺎ ﻓﺤﺴـﺐ، ﺑـﻞ ﺗﺸ أﻳﻀًﺎ إﱃ أن ﻋﺪدًا ﻣـﻦ اﻟﻜﻨـﻮز ﻻ ﻳـﺰال ﻣﺨﺘﺒﺌًﺎ ﰲ أر ﺷﻴﻒ أدوات اﻟﺘﻠﺴـﻜﻮب اﻟﻜﺒـ « اً ﺟﺪ وأﺻﺒﺢ ﺑﻴﺘ ﺎ ﺑﻴﻜﺘﻮرﻳﺲ اﻵن ﺛﺎﻧﻲ ﻧﻈﺎم ﻌﺪ ﺑ ﻛﻮﻛﺒﻲ HR 8799 ﺟـﺮى ﻓﻴـﻪ ﺗﺼـﻮﻳﺮ أﻛﺜﺮ ﻣﻦ ﻛﻮﻛﺒ ﻣﺒﺎﴍة . ﻗﺎل ﺑﻦ ﺳﺎﺗﻠﻴﻒ :» ﺗُﻌﺪ اﻷﻧﻈﻤـﺔ اﻟﺘـﻲ ﺗﻀـﻢ ﻋﺪة ﻛﻮاﻛﺐ ﺧﺎر ﺟﻴﺔ ﺟﺮى ﺗﺼﻮﻳﺮﻫﺎ ﻣﺒﺎﴍةً ﺑﻤﺜﺎﺑﺔ " اﻟﻜﺄس ا ﻘﺪﺳﺔ " ﻟﻼﻛﺘﺸﺎﻓﺎت ﻷﻧﻬـﺎ ﻳﻤﻜﻦ أن ﺗﻌﻠﻤﻨﺎ اﻟﻜﺜ ﻋﻦ ﻃﺒﻴﻌﺔ اﻟﻜﻮاﻛـﺐ اﻟﺨﺎرﺟﻴﺔ ا ﺨﺘﻠﻔـﺔ اﻟﺘـﻲ ﺗﺸـﻜﻠﺖ ﰲ ﺑﻴﺌـﺔ اﻟﺨﺎرﺟﻴﺔ ا ﺨﺘﻠﻔـﺔ ا ﻟﺘـﻲ ﺗﺸـﻜﻠﺖ ﰲ ﺑﻴﺌـﺔ اﻟﺘﻜﻮﻳﻦ ﻧﻔﺴﻬﺎ « ﻛﻤﺎ ﻳﻔﴪ اﻟﻜﻮﻛـﺐ ﺑﻴﺘـﺎ " ﺑﻴﻜﺘﻮرﻳﺲ "د أﺣﺪ اﻷﻟﻐﺎز ﰲ ﻧﻈﺎﻣﻪ إذ ﻳﻤﺘﻠﻚ اﻟ ﻜﺘﻠـﺔ وا ﻮﻗـﻊ ا ﻨﺎﺳـﺒ ﺗﻤﺎﻣـ ﺎً ﻟﺘﻔﺴـ اﻟﺸﻜﻞ ا ﻤﻴﺰ ﻟﻘﺮص اﻟﺤﻄﺎم ا ﺤﻴ ﻂ ﺑﺎﻟﻨﺠﻢ وا ﻜﻮﱠ ن ﻣﻦ ﺑﻘﺎﻳﺎ ﻋﻤﻠﻴـﺔ ﺗﺸـﻜﻞ اﻟﻜﻮاﻛـﺐ وﻳﺸﺠﻊ اﻛﺘﺸﺎف " ﺑﻴﺘﺎ ﺑﻴﻜﺘﻮرﻳﺲ "د ﺑﻬـﺬه اﻟﻄﺮﻳﻘـﺔ ﻋـﲆ إﺟـﺮاء ا ﺰﻳـﺪ ﻣـﻦ ﻋﻤﻠﻴــﺎت اﻟﺘﺼﻮﻳﺮ ا ﺒﺎﴍ ﻟﻸﻧﻈﻤﺔ اﻟﻜﻮﻛﺒﻴﺔ اﻟﺘﻲ ﻗـﺪ ﺗﻜﻮن ﻛﻮاﻛﺒﻬﺎ اﻟﺨﺎﻓﺘﺔ ﻣﺨﺘﺒﺌﺔ ﻋ ﻦ اﻟﺠﻤﻴـﻊ ﺑﻤﺎ ﰲ ذﻟﻚ ﺑﺎﺳـﺘﺨﺪام اﻟ ﺘﻠﺴـﻜﻮب اﻷوروﺑـﻲ اﻟﻔــﺎﺋﻖ اﻟــﺬي ﻳﺠــﺮي إﻧﺸــﺎؤه . ﺣﺎﻟﻴــﺎ . ﺤﺎﻟﻴًـﺎ ﺤﺎﻟﻴﺘ ﻗﺎﻟ وﻗﺎﻟـﺖ ﺑﻴـﺚ ﺑﻴﻠـﺮ ) Beth أﻳﻀًﺎ ﰲ ﺗﺄﻟﻴﻒ اﻟﺪراﺳﺔ وﻋﺎ ﺔ اﻟﻔﻠﻚ ﻗﺎﻟﺖ ﺑﻴـﺚ ﺑﻴﻠـﺮ ا ﺸـﺎرﻛﺔ أﻳﻀـ ﺎً ﰲ ﺗـﺄﻟﻴﻒ اﻟﺪراﺳﺔ وﻋﺎ ﺔ اﻟﻔﻠﻚ ﰲ ﺟﺎﻣﻌﺔ إدﻧﱪة ﻳﺒﺪو »: أن اﻟﻜﻮاﻛـﺐ ﺗﺤـﺐ أن ﻳﻜـﻮن ﻟﻬـﺎ أﺻـﺪﻗﺎء ﻓﺎﻟﻌﺪﻳﺪ ﻣﻦ اﻷﻧﻈﻤﺔ اﻟﺸﻬ ة اﻟﺘﻲ ﺟﺮى ﻓﻴﻬﺎ ﺗﺼﻮﻳﺮ ﻛﻮاﻛﺐ ﺧﺎرﺟﻴﺔ ﻣﺒﺎﴍة ﺗﻀـﻢ ﻋـﺪة ﻛﻮاﻛﺐ ﻋﻤﻼﻗﺔ ﰲ اﻟﻨﻈﺎم ﻧﻔﺴﻪ ﻣﻤﺎ ﻳﺸ إﱃ أن ﺗﺸﻜّﻞ اﻟﻜﻮاﻛﺐ اﻟﻌﻤﻼﻗـﺔ ﰲ ﻣﺠﻤﻮﻋـﺎت داﺧﻞ اﻟﻨﻈﺎم اﻟﻜﻮﻛﺒ ﻲ ﻗﺪ ﻳﻜﻮن أﻛﺜﺮ ﺷـﻴﻮﻋﺎً ﻣﻤﺎ ﻛﺎن ﻳﻌﺘﻘﺪ ﺳﺎﺑﻘ ﺎً وﻣﻦ ا ﺮﺟﺢ أن ﻫﻨﺎك ا ﺰﻳﺪ ﻣﻦ اﻟﻜﻮاﻛﺐ اﻷ ﻗﻞ ﻛﺘﻠﺔ ا ﺨﺘﺒﺌﺔ ﰲ ﻫﺬه اﻷﻧﻈﻤ ـﺔ واﻟﺘ ـﻲ ﻗــﺪ ﺗﻜﺸـﻒ ﻋﻨﻬــﺎ أدوات اﻟ ﺘﻠﺴﻜﻮب اﻷوروﺑﻲ اﻟﻔﺎﺋﻖ «. - ﺳﺒﺘﻤﺒﺮ ﺃﻛﺘﻮﺑﺮ 2 0 2 6