If they are all like Pluto, they are a third the density of Earth, making the mass of all the Solar system's dwarf planets combined: approximately equal to the mass of Earth. Then again, the dwarf planets we've discovered so far may not be representative. read more
If they are all like Pluto, they are a third the density of Earth, making the mass of all the Solar system’s dwarf planets combined: approximately equal to the mass of Earth. Then again, the dwarf planets we’ve discovered so far may not be representative. read more
Total mass of all eight planets = 2.67 x 1027kg Total mass of the sun is around 1.989 x 1030kg, so the combined mass of all of the planets is only around 0.134% of the the planets and sun together. read more
By comparison the inter-planetary medium though may occupy a large volume is nowhere dense enough to even compare to the mass of the sun which is approximately 99% of the solar system's mass. The mass of all planets combined by comparison happens to be approximately 2.6634x10272.6634×1027 kg. read more
The Sun contains roughly 99.8% of the mass of the Solar System. Just the Sun has a mass of 1.99x10^30 kg. The planets, the belts, and even the Oort Cloud only add up to a mere 2.7x10^27 kg. The Sun is 736.5 times more massive than all of the rest of the Solar System’s mass. read more