Can someone help with bright blue-white star in the constellation Orion?

Lim told Yolanda that he bright blue-white star in the constellation Orion is called Rigel. It is 900 light-years away. Yolanda then wondered whether Rigel still exists. What answer could Lim give Yolanda?

I don't know need help please explain :) Thankyou 10 points best answer!
 
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