Distances to Nearby Galaxies
Relation of
distance to redshift
Apparent
brightness of Cepheids
Nearby
Galaxies
Luminosities
of Cepheids
Main sequence
fitting
Star Clusters
Main sequence luminosities
Parallax
Nearby Stars
Astronomical
Unit
Radar echoes
Venus
Which gives
you…
Is measured
by…
The distance
to…
There is a chain of links which get us out to the distances
of galaxies.
Errors in any one affect all the further ones.