Old, Then Young

Riddle: I'm already old when I'm born, and become young when I die, and I’m brightest in middle age. What am I?

Answer: A star! Also acceptable: the sun.

Source: https://www.riddles.com/11307

I'm already old when I'm born, and become young when I die, and I’m brightest in middle age. What am I? — Old, then young by Sean G v1.

Riddle: I'm already old when I'm born, and become young when I die, and I’m brightest in middle age. What am I? Answer: A star! Also acceptable: the sun. — by Sean G v2.