Invent one. This is open to any type of alien.
Gravity, yes. The gravity at the nominal "surface" of Uranus (where pressure is equal to 1 bar) is about 91% of what it is on Earth. Other conditions, though, make Uranus uninhabitable.
live robot + alien = undefined deadlifeform & radioactivity
No, Uranus is also made up of helium, methane, and trace amounts of other gases such as ethane.
Uranus and Neptune are made primarily of water, methane, and ammonia compressed into a solid state.
You can make an alien like this (<>.<>) it sorta looks like a intergalactic alien
ALIEN
Principally methane, although there are other gases which make up it's 'atmosphere'.
I'm pretty sure you press (^_^_^) to make the alien head.
The gases that make up Uranus' atmosphere is mainly hydrogen, helium, and methane.
Alien = Mutating Bacteria + Amphibians
well there is only one way to make an alien.... that is to take it's DNA but if it's a self cloneing alien you put the world at risk
life and void