Meaning: Uranus has a unique axis of rotation that causes it to appear tilted on its side.
Choice of Words: Uranus is the name of a planet, tilted means leaning to one side.
Alternative Expressions
Uranus is a tilted world.
Meaning: This sentence is saying the same thing as the first sentence, but it uses the word "world" instead of "planet."
Choice of Words: The word "world" is another word for "planet." "Tilted" means that Uranus is not perfectly straight up and down, but instead it is leaning to one side.
Uranus is leaning over.
Meaning: This sentence is saying the same thing as the first two sentences, but it uses the word "leaning" instead of "tilted."
Choice of Words: The word "leaning" means that Uranus is not standing straight up like a tree, but instead it is leaning over to the side.