Direct gravitational measurements of subatomic particles, such as protons, are considered impractical, leading to reliance on indirect methods like magnetic field interactions. The discussion raises the possibility of using a box of hydrogen to measure proton mass, suggesting that the containment of neutrons could facilitate measurement without scattering. The feasibility of measuring proton mass through direct gravitational methods remains uncertain, but the idea of utilizing hydrogen or other atoms is proposed as a potential approach. The conversation highlights the challenges and limitations of current measurement techniques in particle physics. Overall, the exploration of alternative methods to determine proton mass continues to be a topic of interest.
