Orbital period race
Double the orbital radius. How much longer is a year?
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Which orbit takes longer to complete?
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How it works & assumptions
For circular orbits with normalized gravitational parameter μ=1, T=2πr^(3/2), angular speed=1/r^(3/2).
A shared fixed central mass; circular, noninteracting orbits. Radius and time use normalized model units.
References: University Physics Volume 1, section 13.5: Kepler's Laws of Planetary Motion
This is an ideal mathematical model, not a measurement or a forecast.