what is unusual about a axis

it has bad grammar.

If you are talking about Uranus, then I can help you. Uranus is tilted on it side. So one side is hot and one side is cold. Brr! However, a theory is that scientist believe that years ago something hit Uranus to make it tilted like that. Maybe a asteroid made it be like that. I'm not sure. I hope this helped.

Also it's tilted about 23.5 degrees.
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And so it is. You should listen to Writeacher.