A phenomenological model of double galaxy dynamics is constructed, assuming a Bohr model for isolated point galaxies bound together in circular orbits by the Newtonian gravitational force. The model is tested by using experimental data from three, independent, random samples of isolated pairs. In each case, the data provides cautious support for the existance of gravitational Bohr orbits in double galaxies, with a mean cosmic Planck's constant/2
á(h/2p) g ñ » 5 ×1074 \texterg s \text.\langle \hbar _g \rangle \approx 5 \times 10^{74} {\text{erg s }}{\text{.}}