text: Mercury-no moons\nVenus-no moons\nEarth-1 moon\nMars-2 moons\nJupiter-at least 16 moons\nSaturn-over 20 moons\nUranus-7 or 8 moons\nNeptune-7 or 8 moons\nPluto-1 moon\n\nOther planets in the universe: who knows?