The radioactive element uranium was named after Uranus when it was discovered in 1789, just eight years after the planet was discovered. Uranus has a volume which is about 63 times the volume of Earth which means that 63 Earths can fit inside Uranus. Uranus is the third largest planet in the Solar System. How big is Uranus? The total volume of Uranus is 6.833×10 13 km 3. Uranus' core density is around 9 g/cm 3, with a pressure in the centre of 8 million bars (800 GPa) and a temperature of about 5000 K. The ice mantle is not in fact composed of ice in the conventional sense, but of a hot and dense fluid consisting of water, ammonia and other volatiles. Uranus the planet is quite big relative to Earth, coming in at about 15 Earth masses, or 8 x 10^25 kilograms.
How Big Is Uranus? The physical size characteristics of Uranus are: The RADIUS of Uranus is 15,882 miles; The DIAMETER of Uranus is 31,763 miles; The CIRCUMFERENCE of Uranus is 99,786 miles; The SURFACE AREA of Uranus is 3,169,515,656 square miles; The VOLUME of … The diameter of Uranus is 51,118 km across. Now, let’s look at volume. It has a diameter of 31,765 miles or 51,118 kilometers which is about four times the diameter of Earth. For comparison, this is about 4 times bigger than Earth. Uranus has a diameter that is four times that of the Earth; the mean radius of Uranus is 15,792 miles (25,362 kilometers).
Uranus is the "butt" of more than a few jokes and witty (and not so witty) puns, but it's also a frequent destination in various fictional stories, such as the video game Mass Effect and TV shows like Doctor Who. The density of Uranus is 1.27 grams per cubic centimeter, making it the second least dense planet in the solar system.