A team of scientists from the University of Innsbruck and collaborators at Leicester, Durham, and Cambridge have made a breakthrough in solving the Thomson problem, a century-old mathematical puzzle. By using gold nanoparticles to mark the positions of electrical charges within ultracold helium droplets, they were able to preserve the charge patterns and examine them after the helium evaporated. This approach provides a physical way to investigate the Thomson problem, which involves understanding how identical electrical charges arrange themselves to minimize their mutual repulsion when confined to a sphere. The researchers analyzed 25 imprints containing five to 36 charges and found close agreement with the predicted lowest-energy arrangements. However, larger droplets presented reconstruction problems due to impact distortions, limiting detailed comparisons at higher charge numbers. Despite this limitation, the experiment demonstrates the potential of using gold nanoparticles to study the Thomson problem. The Thomson problem, first proposed in 1904, is a challenge in understanding how identical charges arrange themselves on a sphere to minimize their repulsion. This problem has been a topic of interest in physics for over a century, and the new approach provides a tangible way to investigate it. The researchers' findings were published in Physical Review Letters and show the promise of using gold nanoparticles to study complex physical phenomena. The use of gold nanoparticles to mark the positions of charges within the helium droplets allows scientists to examine the charge patterns in a way that was previously not possible. This breakthrough has the potential to shed new light on the Thomson problem and other complex physical phenomena, and may lead to new insights and discoveries in the field of physics.