Talk:Galaxy color–magnitude diagram

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Translated to French

This article has just been translated into french. Thank you to all the contributors to this original one. Hop ! Kikuyu3 (talk) 19:30, 21 June 2010 (UTC)[reply]

Relation to size - Magnitude diagram ?

On page 58 of Galaxy Formation & Evolution by Mo, van den Bosch, and White, a similar diagram, relating galaxy size to Luminosity, also shows a separation between Ellipticals (evidently redder, too), and Spirals (evidently bluer, too). If so, then, accordingly, the "Blue Cloud" also contains Irregular galaxies (as well as Spirals). Inexpertly, the "Blue" color reflects star formation, lacking in Ellipticals, with older stellar populations. 66.235.38.214 (talk) 05:45, 21 November 2012 (UTC)[reply]

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