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Transactions of the International Astronomical Union, Volume 8 - September 1954

Contents

Page 4 of 7

Part III. Rapports et comptes-rendus des séances des commissions

  • 26. Commission des etoiles doubles

  • Published online by Cambridge University Press:
    02 August 2017, pp. 385-389
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  • 27. Commission des etoiles variables

  • Published online by Cambridge University Press:
    02 August 2017, pp. 390-396
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  • 28. Commission des nebuleuses extragalactiques

  • Published online by Cambridge University Press:
    02 August 2017, pp. 397-399
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  • 29. Commission des spectres stellaires

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    02 August 2017, pp. 400-442
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  • 30. Commission des vitesses radiales stellaires

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    02 August 2017, pp. 443-457
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  • 31. Commission de l'heure

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    02 August 2017, pp. 458-473
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  • 32. Supplement to the report of the commission

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    02 August 2017, pp. 474-499
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  • 33. Commission de la statistique stellaire

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    02 August 2017, pp. 500-511
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  • Report of the combined meeting of Commissions 33, 34 and 40

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    02 August 2017, pp. 512-515
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  • 34. Commission de la matiere interstellaire et les nebuleuses galactiques

  • Published online by Cambridge University Press:
    02 August 2017, pp. 516-531
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  • 35. Commission de la constitution des étoiles

  • Published online by Cambridge University Press:
    02 August 2017, pp. 532-546
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  • 36. Commission de la spectrophotometrie

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    02 August 2017, pp. 547-595
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  • 37. Commission des amas stellaires

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    02 August 2017, pp. 596-600
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  • 38. Commission pour l'echange des astronomes

  • Published online by Cambridge University Press:
    02 August 2017, pp. 601-605
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  • 39. Commission pour la creation d'observatoires internationaux

  • Published online by Cambridge University Press:
    02 August 2017, pp. 606-609
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  • 40. Commission pour les observations radioelectriques

  • Published online by Cambridge University Press:
    02 August 2017, pp. 610-622
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  • 41. Commission de l'histoire de l'astronomie

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    02 August 2017, pp. 623-630
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  • 42. Commission des etoiles doubles photometriques

  • Published online by Cambridge University Press:
    02 August 2017, pp. 631-661
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I. Symposium sur l'evolution des etoiles

Part IV Symposia

  • I. Discours introductif au symposium sur l'evolution des etoiles

  • V A. Ambartsumian
  • Published online by Cambridge University Press:
    02 August 2017, pp. 665-681
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  • 2. Basic facts of stellar evolution

  • Walter Baade
  • Published online by Cambridge University Press:
    02 August 2017, pp. 682-689
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  • Our present knowledge about stellar evolution is still so limited that, in presenting the basic facts, I wish to restrict myself to a discussion of a very simple but fundamental question.

    The question is this. Are we today in a position to point out two groups of stars, one which in terms of the cosmical time scale is young, the other which is old? The two groups of stars which I want to discuss are the O- and B-type stars of high luminosity as an example of young stars and the stars in globular clusters as an example of old stars.

Page 4 of 7