Talk:Hertzsprung–Russell diagram

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A peculiar characteristic of this form of the H–R diagram is that the temperatures are plotted "from high temperature to low temperature, which aids in comparing this form of the H–R diagram with the observational form."

since this is on a log scale, it might be called a plot of the reciprocal absolute temperature, which as we all know makes more sense anyway 2A01:CB0C:CD:D800:CD8E:A2F0:3F79:2CCF (talk) 12:30, 25 June 2023 (UTC)[reply]

a suggestion for a small change

While looking at the "Historical background" section (Hertzsprung–Russell diagram#Historical background) of the "Latest revision as of 02:00, 17 December 2023" version of this article, I noticed a word that may have some "room for improvement".

It was the word "equivalent" in the sentence

The apparent magnitude of stars in the same cluster is equivalent to their absolute magnitude and so this early diagram was effectively a plot of luminosity against temperature.

My suggestion is to change that one word -- ("equivalent") -- to [something more like] "proportional" or "analogous" ... or maybe even "indicative of".

Any comments? Mike Schwartz (talk) 15:46, 4 January 2024 (UTC)[reply]

Why do stars lie at different positions?

The article doesn't really explain whether stars are born and largely remain at different positions eg on the Main Sequence, or whether they gradually move along the sequence as they age, as some parts of the article imply . In the former case, please explain why different stars are born with varying masses, and therefore different luminosities and temperatures. In the simplest case one might expect that as stars are born from a homogeneous hydrogen cloud by gravitational clumping they would all have similar masses. However this seems not to be the case. 2605:59C0:1191:2D10:45F4:1EC1:C3D4:E4DD (talk) 00:02, 21 January 2025 (UTC)[reply]