Your question is confusing but when you say "the two largest planets" I'm thinking you are talking about Saturn and Jupiter, the largest planets in our solar system. So I think my answer is our sun.
gravity and inertia
No planets are called suns. The Sun is the starat the center of the Solar System
no - they're planets. Suns are stars.
Milky WaySunEarth
No. Planets orbit suns, while moons orbit planets. Planets do not orbit planets.
mars and uranus
No. Stars are like suns, around which planets may orbit.
yes
there called planets
Jupiter
31-2 phenoix suns over timberwolves
If the number of suns is m and the number of planets is n, then the total number of suns and planets is m+n.