Talk:Standard candle
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[edit] "Recently"
The section on "Eclipsing binaries" uses relative descriptions of time: "In the last decade ... Recently". This isn't a good idea, as it means the article ages badly. It would be much better (and more future-proof) if it gave approximate dates instead. -- Finlay McWalter | Talk 22:40, 15 December 2006 (UTC)
- How bout, "since the 1990s"? Sagittarian Milky Way 06:51, 25 March 2007 (UTC)
[edit] Population I/II Cepheids
I think that the last paragraph is incorrect; however, I am not an expert. My understanding is that:
- The Population II Cepheids, or W Virginis variables, have lower luminosity, than the Population I, or classical, Cepheid variables.
- The distances in the Milky Way had been measured using W Virginis variables (and RR Lyrae variables, also Population II stars).
- The extra-galactic distances had been measured using classical Cepheid variables.
- When W. Baade discovered the star populations, only the extra-galactic distances were affected. The distances in the Milky Way were not affected.
JTMnen 07:57, 28 August 2007 (UTC)
