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How large is Uranus compared with Earth?
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Uranus
Two views of the southern hemisphere of Uranus, produced from images obtained by Voyager 2 on Jan. 17, 1986. In colours visible to the unaided human eye, Uranus is a bland, nearly featureless sphere (left). In a colour-enhanced view processed to bring out low-contrast details, Uranus shows the banded cloud structure common to the four giant planets (right). From the polar perspective of Voyager at the time, the bands appear concentric around the planet's rotational axis, which is pointing nearly toward the Sun. Small ring-shaped features in the right image are artifacts arising from dust in the spacecraft's camera.
Uranus is significantly larger than Earth, with a radius four times that of our planet. While Earth is a terrestrial planet, Uranus is classified as a giant, or Jovian, planet, meaning it is composed primarily of hydrogen, helium, and other volatile compounds rather than having a solid surface.1
In terms of specific measurements, Uranus has an equatorial radius of 25,559 km. Due to its relatively fast rotation, the planet exhibits oblateness, resulting in a polar radius of 24,973 km. Despite its large size, Uranus has a relatively low density—only about 1.3 times that of water—which is characteristic of the giant planets in our solar system.21