Highlights of Astronomy

1. Front Matter

   Pages I-XII

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2. Invited Discourses

   1. Front Matter

      Pages 1-1

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   2. Pulsars

      • A. Hewish

      Pages 3-19

   3. Pulsars (Theoretical Considerations)

      • V. L. Ginzburg

      Pages 20-62

   4. Observational Evidence for Galactic Spiral Structure

      • Bart J. Bok

      Pages 63-87

   5. Theory of Spiral Structure

      • C. C. Lin

      Pages 88-121

3. Special Meeting on Direct Exploration of the Moon

   1. Front Matter

      Pages 123-123

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   2. The Apollo Missions

      • L. R. Scherer

      Pages 125-141

   3. Lunar Igneous Activity and Differentiation

      • G. Fielder

      Pages 142-154

   4. Seismology of the Moon and Implications on Internal Structure, Origin and Evolution

      • Maurice Ewing, Gary Latham, Frank Press, George Sutton, James Dorman, Yosio Nakamura et al.

      Pages 155-172

   5. Induced and Permanent Magnetism on the Moon: Structural and Evolutionary Implications

      • C. P. Sonett, P. Dyal, D. S. Colburn, B. F. Smith, G. Schubert, K. Schwartz et al.

      Pages 173-188

4. Joint Discussions

   1. Front Matter

      Pages 189-189

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   2. The Origin of the Earth and Planets

      1. Opening Remarks

         • Cornelis De Jager

         Pages 193-194

      2. Origin of the Solar Nebula

         • Cornelis De Jager

         Pages 195-203

      3. Internal Constitution and Thermal Histories of the Terrestrial Planets

         • Cornelis De Jager

         Pages 204-227

      4. Internal Constitution of the Giant Planets

         • Cornelis De Jager

         Pages 228-238

      5. Open Discussion

         • Cornelis De Jager

         Pages 239-243

   3. Helium in the Universe

      1. Opening Remarks at Joint Discussion on the Helium in the Universe

         • D. E. Osterbrock

         Pages 247-247

      2. Introductory Talk

         • R. J. Tayler

         Pages 248-253

      3. Abundance of Helium in Stellar Atmospheres

         • R. Cayrel

         Pages 254-268

After the same pattern as the XIII th General Assembly of the International Astronom­ ical Union the present Volume of the Highlights in Astronomy contains the texts of the invited discourses given at the XIVth General Assembly held in Brighton, England, August 1970. It contains further the papers and discussion remarks presented at the six joint discussions, as well as the invited papers given at the special session on the Moon. In addition this Volume contains the papers given at the joint meeting of Commissions 24, 27, 30, 33 and 37 on RR Lyrae Stars. It goes without saying that the nearly hundred papers printed in this Volume represent only a minor part of all matter dealt with at the XIVth General Assembly of the Union; the many important discussions that took place in a few hundred commission meetings are not included. For short abstracts and reviews of these the reader is referred to Transactions of the International Astronomical Union XIVB. I wish to thank those who contributed to this Volume for the speed in submitting the manuscripts of their papers. This, together with the efficiency of the Publishers allowed for a rapid publication.

• astronomy
• astrophysics
• cosmic ray
• earth
• interstellar matter
• moon
• neutron star
• observatory
• planet
• stellar evolution
• sun
• universe

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