Notes on verification

Well-corroborated by multiple physics education and research sources (Fermilab, Symmetry Magazine) citing standard solar model neutrino flux calculations, confirmed by experimental detections at Super-Kamiokande, SNO, and Borexino. The '60 billion' figure is a reasonable rounding of the commonly cited ~65 billion value. [tier=gold indep_score=0.95 clusters=3 claim_tier=notable | framework convergence=partial on Standard Solar Model neutrino flux calculations combined with experimental detector measurements (upstreams: Standard Solar Model, Super-Kamiokande, Sudbury Neutrino Observatory (SNO)) — publishers independent, evidence may not be | kind=empirical eligibility=high (extractor: empirical/medium)]