The planned Gaia satellite is a successor to Hipparcos. It will have an astrometric accuracy of 24 micro-arcseconds, and be able to detect Cepheid variable stars in the Magellanic clouds (~ 70kpc away). Estimate how accurately Gaia will determine distances to these Cepheids
The Attempt at a Solution
I haven't really done any cosmology before so this is new to me. I've just defined a parsec in the previous question as a star 1pc away having a parallax of one arcsecond.
I'm not sure what value this question actually wants as an answer
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