Cosmic Distance Ladder
The graphic below is from page 49 of the paper A 2.4% Determination of the Local Value of the Hubble Constant [arxiv:1604.01424]
Some articles about the cosmic distance ladder: Cosmology is in crisis about how to measure the universe, by Sarah Scoles Why Cosmology’s Expanding Universe Controversy Is An Even Bigger Problem Than You Realize, by Ethan Siegel
Other references: Slides from a talk by Stefano Casertano: Gaia DR2 and beyond: contributions to the local distance scale Additional materials from the Oct. 2018 KICP workshop: The Future of H0: Crisis or Concordance