Free Astronomy Magazine January-February 2026 ARABIC VERSION

spiralinginward. “Thissuggeststidal disruption and accretion mecha- nisms remain active long after the main-sequence phase of a star’s life,” said Debes. “Mass loss during stellar evolution can destabilize or- bits, affecting planets, comets, and asteroids.” The system may exem- plify delayed instability, where multi-planet interactions gradually destabilize orbits over billions of years. “Thiscouldpointtolong-term dynamical processes we don’t yet fully understand,” Debes added. Astronomers are now investigating whatmayhavetriggeredthedisrup- tion.SurvivingJupiter-sizedplanets could be responsible but are diffi- cult to detect due to their separa- tion from the white dwarf and low temperatures. Data from European SpaceAgency’sGaiaspacetelescope may be sensitive enough to detect such planets through their gravita- tionalinfluenceonthewhitedwarf. NASA’sJamesWebbSpaceTelescope couldalsoprovideinsightsbytaking infraredobservationsofthesystem for signs of outer planets. “Future observations may help distinguish betweenaplanetaryshakeuporthe gravitationaleffectofastellarclose encounter with the white dwarf,” saidDebes.                                              JANUARY-FEBRUARY2026 39 ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ ﺳﺒﺒﺖ ﻫﺬا اﻟﺘﻤـﺰق ﻗـﺪ . ﺗﻜـﻮن اﻟﻜﻮاﻛـﺐ اﻟﻨﺎﺟﻴﺔ ﺑﺤﺠﻢ ا ﺸﱰي ﻣﺴﺌﻮﻟﺔ ﻋـﻦ ذﻟـﻚ ﻟﻜﻨﻬﺎ ﺻﻌﺒﺔ اﻻﻛﺘﺸﺎف ﺑﺴﺒﺐ ﺑﻌـﺪﻫﺎ ﻋـﻦ اﻟﻘﺰم اﻷﺑﻴﺾ ودرﺟﺎت ﺣﺮارﺗﻬﺎ ا ﻨﺨﻔﻀﺔ . ﻗﺪ ﺗﺴﺎﻋﺪ ﺑﻴﺎﻧﺎت ﺗﻠﺴﻜﻮب اﻟﻔﻀـﺎء ﺎﻳـﺎ ﻏ اﻟﺘﺎﺑﻊ ﻟﻮﻛﺎﻟﺔ اﻟﻔﻀﺎء اﻷوروﺑﻴﺔ ﻋﲆ رﺻـﺪ ﺗﺄ ﺛ ﻫﺎ اﻟﺠ ﺬﺑﻲ ﻋﲆ اﻟﻘﺰم اﻷﺑـﻴﺾ ورﺑﻤـﺎ ﻳﻘﺪم ﺗﻠﺴـﻜﻮب ﺟـﻴﻤﺲ وﻳـﺐ اﻟﻔﻀـﺎﺋﻲ اﻟﺘﺎﺑﻊ ﻟ ﻮﻛﺎﻟﺔ ﻧﺎﺳﺎ رؤى إﺿﺎﻓﻴﺔ ﺑﺎﻷﺷـﻌﺔ ﺗﺤﺖ اﻟﺤﻤﺮاء ﻟﻠﻨﻈﺎم ﺑﺤﺜًـﺎ ﻋـﻦ ﻋﻼﻣـﺎت وﺟﻮ د ﻛﻮاﻛﺐ ﺧﺎرﺟﻴﺔ . وﻗﺎل دﻳﺒﺲ :" اﻷرﺻﺎد ا ﺴﺘﻘﺒﻠﻴﺔ ﻴﻴﺰ ﺗﻤ ﻗﺪ ﺑ اﺿﻄﺮاب ﻛﻮﻛﺒﻲ أو ﺗﺄﺛ ﺟ ﺬﺑﻲ ﻟـﻨﺠﻢ ﻗﺮﻳﺐ ﻟﻠﻘﺰم اﻷﺑ ". ﻴﺾ ﻗﺎل دﻳﺒﺲ :” ﻫﺬا ﻳﺸ إﱃ أن آﻟﻴﺎت اﻟﺘﻤﺰق ﺑﻔﻌﻞ ﻗﻮى ا ﺪ واﻟﺠﺰر واﻻﻣﺘﺼـﺎص ﺗﻈـﻞ ﻧﺸﻄﺔ ﻃﻮﻳﻼً ﺑﻌﺪ اﻧﺘﻬﺎء ﻣﺮﺣﻠﺔ اﻟﺘﺴﻠﺴـﻞ اﻟﺮﺋﻴﴘ ﰲ ﺣﻴﺎة اﻟﻨﺠﻢ ” : وأﺿﺎف “ . ﻳﻤﻜـﻦ ﻟﻔﻘﺪان اﻟﻜﺘﻠﺔ أﺛﻨﺎء ﺗﻄﻮر اﻟﻨﺠﻢ أن ﻳﺰﻋﺰع اﺳـﺘﻘﺮار ا ـﺪارات ﻣـﺆﺛﺮ اً ﻋـﲆ اﻟﻜﻮاﻛـﺐ وا ﺬﻧﺒﺎت واﻟﻜﻮﻳﻜﺒـﺎت . “ وﻗـﺪ ﻳﻤﺜـﻞ ﻫـﺬا اﻟﻨ ﻈﺎم ﻣﺜﺎﻻً ﻋﲆ اﻻﺿﻄﺮاب ا ﺘﺄﺧﺮ ﺣﻴـﺚ ﺗﺆدي اﻟﺘﻔﺎﻋﻼت ﺑ ﻋﺪة ﻛﻮاﻛـﺐ ﺗـﺪرﻳﺠﻴ ﺎً إﱃ زﻋﺰﻋـﺔ اﺳـﺘﻘﺮار ا ـﺪارات ﻋـﲆ ﻣـﺪى ﻣﻠﻴﺎرات اﻟﺴﻨ . وﻗﺎل دﻳﺒﺲ :” ﻗـﺪ ﻳﺸـ ﻫﺬا إﱃ ﻋﻤﻠﻴﺎت دﻳﻨﺎﻣﻴﻜﻴﺔ ﻃﻮﻳﻠﺔ اﻷﻣﺪ ﻟـﻢ ﻧﻔﻬﻤﻬ ـﺎ ﺑﻌ ـﺪ ﺑﺸ ـﻜﻞ ﻛﺎﻣ ـﻞ ." وﻳﺤﻘــﻖ اﻟﻔﻠﻜﻴﻮن ﺣﺎﻟ ﺎً ﻴ ﰲ اﻟﻌﻮاﻣﻞ اﻟﺘﻲ ﻗـﺪ ﺗﻜـﻮن ــــــــــــــــــــــــــــــــــــ - ﻳﻨﺎﻳﺮ ﻓﺒﺮﺍﻳﺮ 2 0 2 6