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

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

How fast does light travel?, The speed of light

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

If it takes thousand of years for light to reach from distance stars, how do we know the current state of these stars? - Quora

Why do we see a star as a dot, why not as a streak of light? - Quora

How can the light reflected from far planets reach us without

ALMA Detects Fluorine in Distant Star-Forming Galaxy

How can the light of stars billions of light years away from the

If light from stars takes a long time to reach Earth, why don't we