Planet Justin B: mass=5x10^24, radius=7300km, temperature=500K, semi major axis=0.52AU
Planet Stewie G: mass=2x10^27, radius=85000km, temperature=150K, semi major axis=6.4AU
Planet D Cherry:mass=4x10^23, radius=4500km, temperature=105K, semi major axis=37.8AU
(a) What are the average densities...