Due to the scale of the universe, when we observe a star in the night sky, we are seeing it?

1 Answer
Jul 5, 2016

All stars we see with the naked eye are within our Milky Way. We cannot see stars from other galaxies, and we are seeing the light it emitted many years ago.


If you observe a star that is 30 light years away, you are seeing the star as it was 30 years ago, since it took light 30 years to reach between the star and Earth. Therefore we are looking at its past, not its present.