A new arXiv preprint (2605.18953) uses nearly a decade of high-resolution solar imagery across three narrowband filters to measure photometric centroid shifts induced by starspots and faculae. The study tracks the Sun through both activity maximum and minimum, yielding a mean astrometric jitter of 0.342 µas pc at 607 nm—well below the ~3 µas reflex motion expected from an Earth-mass planet at 1 pc. Methodology relies on direct imaging rather than spot simulations alone, though the authors augment the dataset with synthetic spot models; sample size spans one full solar cycle but is limited to a single star. This empirical floor strengthens the case for next-generation astrometric missions after Gaia, where instrument stability rather than stellar noise will set detection limits between Earth and Mars masses around solar analogs. Earlier theoretical work (e.g., Lagrange et al. 2011) had overestimated jitter by factors of several; the new measurements align more closely with conservative Gaia error budgets while highlighting wavelength dependence that future multi-band surveys could exploit. Limitations include the assumption that other solar twins behave identically and the absence of peer review.