Eclipse-based R_⊙ measurements in our study (red bar) and those of previous studies (blue bars), in comparison with the modern helioseismic R_⊙ estimate (959﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩34) of M. Takata & M. O. Gough (2024). The blue bars compositely show the R_⊙ estimates of the previous studies (D+80; S+83; Y. Kubo 1993; K+09; P. Lamy et al. 2015; L. Quaglia et al. 2021; H+26a). Figure 5 does not show D+16’s data, as they have considerable data offsets with their probable source articles (e.g., D+80; S+83).