yes - the sun ages - it'll use up all its hydrogen someday - but
   the light (photons) that come out of it don't "experience" time.
   We see the light move (8 minutes to get from sun to earth) but
   if you rode a light beam, you wouldn't experience the sensation
   of time passing. According to einstein anyway - it has to do
   with how space and time are one thing that we all live on. "