To achieve interstellar travel, traditional chemical propulsion is insufficient, prompting interest in solar sails powered by lasers. A recent study by Chao Shen and Jiaze Li from the Harbin Institute of Technology examines the physics of solar sails as they near relativistic speeds. The research identifies three forces from light impacting the sails: incident light, specular reflection, and diffuse scattering. As the sails accelerate, they experience a Doppler effect that reduces thrust. Notably, at 75% of the speed of light, relativistic light aberration causes diffuse scattering to act as drag, complicating acceleration. While the pushing laser still exerts a net positive force, the efficiency drop is significant. The study focuses on radiative dynamics, excluding other factors like interstellar gas drag or material limitations. Engineers are exploring advanced metamaterials to enhance performance, but practical testing of interstellar solar sails remains distant. Understanding these dynamics is crucial for future interstellar missions, as every advancement aids in preparing for potential probes to other stars.