Since a star's light takes so long to reach us, how do we know

RahasyaTv - It takes much longer for their light to reach

Redshift - Las Cumbres Observatory

Bibliography - Items I have already read: Britannica, T. Editors of Encyclopaedia (2017, April 27). - Studocu

When you look up, how far back in time do you see?

When I look at a star 1 million light years away, am I seeing the light from that star 1 million years ago, or am I seeing the star itself at that

What Is Parallax? - How Astronomers Measure Stellar Distance

What is a light-year?

How Far Back Into The Past Can We See In The Night Sky? » Science ABC

Light and Doppler shift

How can we observe other stars if they are so far away and it takes light so long to reach us? - Quora