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NASA
GSFC

Various numbers I need to remember put in one handy spot. Your actual mileage may vary

• Physical Constants The basic numbers of the universe.
• Physical Constants My short web version.
• Reactions Cross sections and reaction rate coefficients for important processes in neutral gas clouds in the solar system.
• Energy vs. V_rel Center-of-mass energy vs. relative velocity for ion-neutral collisions.
• Velocity vs R (Jupiter) Keplerian, magnetic field co-rotational, and relative (|v_kep - v_B|) at Jupiter
• Velocity vs R (Saturn) Keplerian, magnetic field co-rotational, and relative (|v_kep - v_B|) at Saturn