Sky tell us - time is relative.

Lying on a lawn..when I look up in the sky and see the stars on a dark night. I wonder..Many of those stars have already died and yet their light still reaches us and thus we see them.. What we see as as bright star is already dead may be few thousand years ago...Time is really relative isn't it..
What an irony..everyone looks at the sky but no one know how the REAL sky is like..
we study what we exists...but what we see is not always what exist!
hmmm.......