what is the largest planet known
The smallest planet in regards to both mass and volume is Mercuryâthis tiny world is nearly 20 times less massive than Earth, and its diameter is about times 2 Â½ smaller. In fact, Mercury is closer in size to our Moon than to Earth. The largest planet in our solar system by far is Jupiter, which beats out all the other planets in both mass and volume. Jupiterâs mass is more than 300 times that of Earth, and its diameter is about 11 times larger than Earthâs diameter.