How do we measure the distance between celestial objects?
In side solar system Radar is used to measure distances.
For near by stars a method called parallax is sued to measure distances.For far way galaxies and clusters Cepheid variable stars are used as standard candle.For galaxies where we can not individual resolve individual stars.. Type 1 a supernova is used as standard candle. Red shift is also used to estimate distances
See picture t o know how parallax is used to measure distance
Relation between luminosity and pulsation period is used to find the brightness as stand![![enter image source here]() ard candle...
picture credit physics smc edu.