Distance ladder and alternatives
Pathways to extragalactic distance
Absolute indicators: S-Z effect
Shift of blackbody peak of CBR
Measuring SZ effect -- why interferometry?
Temperature measurement and example
Some real data: Sunyaev-Zeldovich measurements for 18 galaxy clusters. SZE (contours) and X-ray (gray scale) images of each cluster. From Reese et al, ApJ 581, 53.
Another absolute indicator: water maser proper motions
NGC 4258: AGN with accretion disk
Cepheid distance to same galaxy
