In the end of Star Wars Episode VI: Return of the Jedi, Anakin, Yoda and Obi-wan's spirits appear in a vision on Endor.

Obi-wan and Yoda look old (as they are when die), but Anakin is young.
[![enter image description here][1]][1]

Why is Anakin the only one to appear young if, when he died, he was old and deformed?


  [1]: https://i.sstatic.net/3yO5L.jpg