Space.com indicates that Neptune's diameter of 15,299 miles is fourth longest among the planets. At 102 trillion trillion kilograms, Neptune has the third-highest mass of the eight planets in the solar system. However, it was one of the last planets discovered because it is the farthest from the sun.
Cool Cosmos notes that Neptune's volume is 57.7 times that of Earth. Neptune has a large surface area of 2.9 billion square miles, though it consists of water and ice rather than solid ground. Because of its gas atmosphere and liquid surface, Neptune has a modest density of 1.638 grams per cubic centimeter.Learn More
Venus does not have any rings. The planet does not have rings because the temperature on Venus is too high for their formation. Rings are associated with the outer planets of Jupiter, Saturn, Neptune and UranusFull Answer >
The acceleration due to gravity on the surface of Uranus is 8.69 meters per second squared. The value of this acceleration due to gravity on the earth's surface is 9.81 meters per second squared. So the gravitational pull of Uranus is 86 percent of that of Earth.Full Answer >
As the only known planet that is habitable for human beings, the Earth’s importance is self-evident. Every living organism known to science obtains all of its resources from Earth, and has very few other options available. Without the Earth, humans would be doomed to extinction, unless they were able to adapt to another planet's conditions before the Earth disappeared.Full Answer >
Jupiter, like all the other planets, has seasons. Since Jupiter takes about 12 Earth years to make a full orbit around the sun, each of its seasons lasts about three Earth years.Full Answer >