What is the heaviest planet in the solar system?

Jupiter is the heaviest planet in the solar system, with a mass of 1.90 x 10^27 kg. The gas giant's mass is equivalent to about 318 Earths. Jupiter is so heavy that it's twice as heavy as all the planets in the solar system combined.

Jupiter is a gas giant that is mostly made up of hydrogen and helium. Despite its great mass compared to other planets, Jupiter still has only a fraction of the mass of a thousand suns. Still, the gas planet's gravitational pull, due to its mass, has helped shaped the solar system. The largest planet also has the most moons, with about 67 natural satellites.