The smallest planet in regards to both mass and volume is Mercury — at 4,879 km across and 3.3010 x 1023 kg, this tiny world is nearly 20 times less massive than Earth, and its diameter is about 2½ times smaller. In fact, Mercury is closer in size to our Moon than to Earth.
Beside above, is Jupiter or Earth heavier?
The gas giant is approximately 318 times as massive as Earth, according to planetary scientist Alan Boss. If the mass of all of the other planets in the solar system were combined into one “super planet,” Jupiter would still be two and a half times as large.
| Planets ( least massive to most massive ) | Mass of Planets in Kilograms |
|---|---|
| Mars | 6.42 x 1023 |
| Venus | 4.87 x 1024 |
| Earth | 5.97 x 1024 |
| Uranus | 8.68 x 1025 |
Just so, which planet is lightest in weight?
Saturn is the second biggest planet in our solar system. Similar to Jupiter it has over 60 moons and is made up of different gases. Even though it is a gas giant, it is also the lightest planet. Saturn is so light that it would float in water, if there was an ocean big enough.