Solar System Planet Radius. Learn facts about the solar system's genesis, plus its planets, moons. Nasa/johns hopkins university applied physics laboratory/carnegie institution of washington). Of the objects that orbit the sun directly, the largest are the eight planets.
It's tiny with a radius of only 2,440 km making it the smallest planet in the solar system.
It's tiny with a radius of only 2,440 km making it the smallest planet in the solar system. It's tiny with a radius of only 2,440 km making it the smallest planet in the solar system. With a radius of 432,168.6 miles (695,508 kilometers), our sun is not an especially large star—many are several times bigger—but it is still far more massive. Once all of the material in the area of each planetary embryo was pulled in, the planets were born. In a hypothetical solar system there exist: The solar system consists of the sun; States that the radius vector of a planet (a line joining the centre of the sun to the centre of the planet) sweeps out. Planet closest to the sun.
