A former NASA physicist, Dr. Sierra Solter-Hunt, has issued a cautionary statement regarding the proliferation of low-cost satellite “megaconstellations” such as Elon Musk’s Starlink, warning of potential disruption to Earth’s magnetosphere and consequent exposure to cosmic rays. The substantial quantity of wireless internet satellite debris produced by SpaceX’s Starlink is shown by Dr. Solter-Hunt’s new study, which estimates that over 2,755 lbs (1.3 tons) of junk are added to Earth’s atmosphere per hour.
Dr. Solter-Hunt is concerned about the possible cumulative effect of the 5,504 functioning Starlink satellites already in orbit and the plans for tens of thousands more, especially as existing spacecraft approach the end of their lives. According to her, the buildup of highly conductive metal debris may disrupt or even trap Earth’s magnetic field, which might result in atmospheric stripping that is similar to what happened on Mars and Mercury.
Dr. Solter-Hunt highlights the importance of resolving the issue, drawing on her time working with NASA’s Stardust spacecraft research team and her later work investigating electromagnetic behavior in low-Earth orbit at the US Air Force Research Laboratory. She issues a warning that the situation may get worse due to the anticipated growth of satellites over the next 10 years, which might have permanent effects.
Dr. Solter-Hunt is concerned about the size of the metal debris compared to the Earth’s magnetosphere, which is relatively light and contains the Van Allen Belts, which are an important shield against cosmic radiation. She draws attention to the mass difference between these satellite debris accumulation zones and protective regions, highlighting the possibility of hitherto unseen effects on Earth’s atmospheric integrity.
