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Astronomy

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  • $\begingroup$ This is more a guess, so I haven't put as an answer, though I'm fairly certain it is very close to the truth: measuring the Hubble shift of nearby objects gives you a less model-dependent way of measuring H, but the measurement of the Hubble shift is more error-prone. Measurement of the Hubble shift of further away objects is less error-prone, but using them to measure H is much more model-dependent. $\endgroup$
    – John Davis
    Commented Jan 6, 2017 at 18:31
  • 3
    $\begingroup$ I can assure you, from my many years of experience in this, that the answer to your question is unequivocally -- No. Some may have strong opinions on this, but scientists differ on this and no one knows for sure. However, the situation now is better than it was before. $\endgroup$
    – eshaya
    Commented Jan 6, 2017 at 22:15
  • $\begingroup$ I was afraid that was exactly the case... thank you eshaya $\endgroup$
    – Dac0
    Commented Jan 6, 2017 at 22:19
  • $\begingroup$ There's some controversy over the constant: arxiv.org/abs/1512.07364 and en.wikipedia.org/wiki/Hubble_Bubble_(astronomy) $\endgroup$
    – Wayfaring Stranger
    Commented Jan 7, 2017 at 15:46
  • $\begingroup$ illustration of this phenomenon cfa.harvard.edu/~dfabricant/huchra/hubble/h1920.jpg $\endgroup$
    – samcarter_is_at_topanswers.xyz
    Commented Jan 11, 2017 at 17:16