Timeline for Cosmology: Is there any experimental evidence for the redshift scale-factor relation?
Current License: CC BY-SA 4.0
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| May 31, 2021 at 14:06 | comment | added | Guy Inchbald | @JohnHunter Yes, the distance ladder gets periodically recalibrated. But that is precisely because the quality and strength of the empirical evidence improve with time. See the answer's last paragraph. | |
| May 31, 2021 at 12:43 | comment | added | John Hunter | This is the so called 'distance ladder', most of these measurements are quite nearby (in cosmological terms) and not sure whether these could distinguish experimentally between the relation in the question or alternative relations that give a similar result at low redshift. Subsequent measurements have extended things to higher redshift, but then there are unexplained phenomenon discovered by these higher redshift measurements such as the Hubble tension... | |
| May 31, 2021 at 11:12 | history | edited | Guy Inchbald | CC BY-SA 4.0 |
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| May 31, 2021 at 11:07 | history | edited | Guy Inchbald | CC BY-SA 4.0 |
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| May 31, 2021 at 10:54 | history | edited | Guy Inchbald | CC BY-SA 4.0 |
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| May 31, 2021 at 10:46 | history | edited | Guy Inchbald | CC BY-SA 4.0 |
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| May 31, 2021 at 10:40 | history | answered | Guy Inchbald | CC BY-SA 4.0 |