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What are six different methods to measure distances in Astronomy in regards of their respective range in terms of astronomical objects?

So far I can name 4: Parallax method, radar ranging, main-sequence fitting, cepheid variables.

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    $\begingroup$ There is also type 1a supernovae, red shift (for distant objects), and possibly by studying the orbits of binary systems (but I'm not sure about that one). $\endgroup$ – Mick Apr 5 '18 at 23:18
  • $\begingroup$ Note that the parallax method can be applied to globular clusters as well as individual stars, and can increase the range/accuracy by about 3 times (iirc). $\endgroup$ – Mick Apr 5 '18 at 23:26
  • $\begingroup$ @Mick Thanks for sharing the other methods with me. This is interesting about the parallax method. $\endgroup$ – bookfiend Apr 5 '18 at 23:31
  • $\begingroup$ You will need to check what I have told you. I am just an armchair astronomer. $\endgroup$ – Mick Apr 5 '18 at 23:32
  • $\begingroup$ The wikipedia page on the cosmic distance ladder could also help... $\endgroup$ – AtmosphericPrisonEscape Apr 6 '18 at 6:50
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Using type Ia supernova light curves.

The RR Lyrae period-luminosity relation.

Moving cluster statistical parallax.

Surface brightness fluctuations.

Redshift-distance relation.

Using merging gravitational wave sources as standard sirens.

These and more can be pursued following this link. https://en.m.wikipedia.org/wiki/Cosmic_distance_ladder

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