Space fact: despite Uranus having 14.5x more mass than Earth, you actually weigh 10% less on Uranus than you do on Earth. How? Uranus is spread out into a volume 63x larger than Earth, with 23% Earth& #39;s density, so at the cloud tops of Uranus we call a "surface", gravity is weaker

Caveat: you can& #39;t stand on Uranus. You& #39;d free-fall until you got crushed by rising atmospheric pressures while being melted by rising temperatures. If you were not crushed & melted (thanks to an amazing space suit) you& #39;d reach some point where you would float

Near the equator of Saturn you would weigh less than you do on Earth (by -8.4%), even though Saturn is almost 600x Earth& #39;s mass. Saturn is the least dense planet in our solar system, so it& #39;s same reason as before!

Saturn is at a knife-edge though: the fact it spins so rapidly means it has a large outward acceleration at the equator. The rotation causes Saturn to bulge out at the equator too, so you& #39;re farther from the mass. If Saturn stopped rotating, you& #39;d weigh +6.5% MORE there vs. Earth

We need a mission to explore the interior structure of Uranus (Austin Powers: I thank you). So far it has only been visited by fly-bys. Planetary scientists do want a dedicated mission to Uranus or Neptune (it& #39;s about time right?) and they are even on Twitter: @IcyGiants