Symmetry Breaking or Analytical Freedom? A Typed Audit of a Cygnus–B-DNA Geometric Correspondence

Can a stellar configuration identify a particular DNA helical shape? We test a map from two Cygnus ecliptic angles to helical repeat and rise-to-radius ratio that matches canonical B-DNA within 0.92% relative RMS error. The original route uniquely wins all five retained B-DNA structures and none of the A/Z controls in the historical panel, with continuous dominance across the B-DNA region. Selecting the five brightest stars of all 88 constellations preserves the Northern Cross and the unchanged map’s first rank at the benchmark. Cygnus alone has a minimum spanning tree with four arms meeting at one star; brightness and opposition recover its axis before molecular scoring. Repeating this retrospective selection on new quintets gives 0.17–0.21% molecular-score exceedance overall and 1.08–1.46% among admissible panels under two source models. Expanded formulas and target substitution remove canonical first rank; the exploratory molecular graph extension identifies Cygnus under H2 but not H1. Historical exceedance rises from 2.7% to 55.9% when coordinate roles and formulas are released. The geometric “stellar DNA” hypothesis links an astronomically recoverable configuration to a measured B-DNA preference, with role asymmetry defining its specificity and explicit predictions for independent tests.