They didn't. The farthest humans have been from Earth is the moon. Uranus is many times farther away. Uranus has been visited by unmanned space probes.
spaceships can help humans to get to Uranus
Humans can't live on Uranus as there is no air, and the planet is made up mostly of gas, I believe.
Yes
Uranus is uninhabited by humans. But I'm not so sure about aliens...
Uranus is 1.687 Billion miles from the Earth. Humans have only travelled as far as the Moon. The Moon is 238,857 miles from Earth. It cost a massive amount of money to go to the Moon in the 1960s and early 1970s. The cost of going to from Earth to Uranus and back to the Earth would be far too expensive for any one nation, and probably even a combination of countries pooling their resources. Uranus is a gigantic gas giant planet. Humans could not walk on Uranus, because the gravitational pull of the planet would crush them in seconds. The nearest humans from Earth could get to Uranus is either to orbit the planet, and the fuel to get out of Uranus orbit would be incredible, so it is more likely, people would land on a small moon near Uranus and study the planet from there. There is no good reason to send people to Uranus now and we will probably not go for a very long time, if ever.
Since it is so cold at Uranus any living being on Earth (humans pretty much, duhhh) would freeze in an instant
well just go on google and type in uranus and then click on uranus there you see uranus.
because it would hurt
No humans have ever been to Uranus. Voyager 2 is the only space probe that has visited it.
No, because Uranus is a gaseous planet, which means it has no surface. Nowhere to land a spacecraft.
No. There is no oxygen in Neptune's atmosphere
No. Uranus does have an atmosphere, but not one we could breath; it is mostly hydrogen and helium with no free oxygen. Even aside from that, Uranus is too cold and there is no surface to stand on.