I feel like this comment exaggerates how far the human eye can perceive into the universe. Anything you can see with your eyeball is only as far as a few hundred light years, which means it would be extremely unlikely that any star you can see is significantly different in location “now” than when the light emitted.
Also it would be extremely unlikely for any star you can see with your eyes to have died between the time light is emitted and when you experience it.
That’s a different story for things you can see through a telescope, or through a camera, but just looking up… Those points of light are pretty close and extremely bright stars.
You do point out the light from the stars dim due to inverse square law, but don’t forget they also red-shift due to the expansion of the universe. The cosmic microwave background radiation didn’t start as microwaves, it started as red visible light that slowly red shifted into the infrared, then into microwave.
I feel like this comment exaggerates how far the human eye can perceive into the universe. Anything you can see with your eyeball is only as far as a few hundred light years, which means it would be extremely unlikely that any star you can see is significantly different in location “now” than when the light emitted.
Also it would be extremely unlikely for any star you can see with your eyes to have died between the time light is emitted and when you experience it.
That’s a different story for things you can see through a telescope, or through a camera, but just looking up… Those points of light are pretty close and extremely bright stars.
You do point out the light from the stars dim due to inverse square law, but don’t forget they also red-shift due to the expansion of the universe. The cosmic microwave background radiation didn’t start as microwaves, it started as red visible light that slowly red shifted into the infrared, then into microwave.