Are All the Stars We See Actually Dead?

[Maroc]

All the stars are Dead !??!

My physics teacher says all the stars we see today are ones that are either dead or near death. All this is due to light. When a star is first created we don't see it take around 200 light years for the light of the star to reach us.

Is that amazing or what?

is any of it true ?

 

[mgb_phys]

Partly,
We see stars at the time the light left them so for very distant galaxies seen by a large telescope that light could be billions of years old and the stars no longer exist.
Most of the stars you see with your eye are within a few 100 to a few 1000 light years so they probably haven't changed much

 

[ideasrule]

Every star that you can see, even with a large telescope, is almost certainly still alive. Only the stars in distant galaxies have a good chance of being dead, but those galaxies are so far away that only the largest telescopes on Earth can pick them out.

 

[Maroc]

Ah okay. Thanks for the clear up.