>but now you are telling me you know everything after all
Where did I say that?
>Standard candles
So the stars are candles now? How do you know they work like candles?
So the stars are candles now? How do you know they work like candles?
Are you really this daft or are you just trolling me? Re-read my comment on Cepheid stars and why they are called 'standard candles'. Better yet, go read up on astronomy and learn something useful for a change.
They are called candles because they think they look (and act) like candles.
Guess what, it still doesn't prove their distance. Even science disagrees:
Uncertainties in Cepheid determined distances
Chief among the uncertainties tied to the classical and type II Cepheid distance scale are: the nature of the period-luminosity relation in various passbands, the impact of metallicity on both the zero-point and slope of those relations, and the effects of photometric contamination (blending) and a changing (typically unknown) extinction law on Cepheid distances. All these topics are actively debated in the literature.[23][20][25][32][39][40][41][42][43][44][45][46]
These unresolved matters have resulted in cited values for the Hubble constant (established from Classical Cepheids) ranging between 60 km/s/Mpc and 80 km/s/Mpc.[22][23][24][25][26] Resolving this discrepancy is one of the foremost problems in astronomy since the cosmological parameters of the Universe may be constrained by supplying a precise value of the Hubble constant.[24][26] Uncertainties have diminished over the years, due in part to discoveries such as RS Puppis.
Delta Cephei is also of particular importance as a calibrator of the Cepheid period-luminosity relation since its distance is among the most precisely established for a Cepheid, partly because it is a member of a star cluster[47][48] and the availability of precise Hubble Space Telescope/Hipparcos parallaxes.[49] The accuracy of the distance measurements to Cepheid variables and other bodies within 7,500 lightyears is vastly improved by combining images from Hubble taken six months apart when the Earth and Hubble are on opposite sides of the Sun.[50]
Even with those uncertainties, standard candles are usable to a strong degree. How accurate are your FE measurements and what methods do you use with those? How far away is the 'dome'? How do you measure that distance? Why can't I see coastal Lisbon, Portugal from coastal New York city with a telescope? Where are these answers?
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