1. Editorial

   • Zdenek Kopal
   • Charles P. Sonett

   EditorialNotes Pages: i - i

2. Interaction between the interstellar medium and solar wind plasma

   • Max K. Wallis

   OriginalPaper Pages: 3 - 18

3. Cosmological hadronic fireball

   • R. F. Sisteró

   OriginalPaper Pages: 19 - 25

4. A reexamination of the Gum nebula

   • Klaus P. Beuermann

   OriginalPaper Pages: 27 - 38

5. On the limiting polarization of radio-waves

   • S. Grounds
   • D. Ter Haar

   OriginalPaper Pages: 39 - 42

6. Comments on the paper by Mack and Robbins relating to a recent theory on the origin of the universal X-ray background

   • P. Raychaudhuri
   • P. Bandyopadhyay

   Research Note Pages: 43 - 44

7. On a recent theory of the origin of the X-ray backgroun-dfurther arguments: Comments on the preceding note

   • John E. Mack
   • Donald E. Robbins

   Research Note Pages: 45 - 46

8. Ultrahigh energy photons, electrons, and neutrinos, the microwave background, and the universal cosmic-ray hypothesis

   • F. W. Stecker

   OriginalPaper Pages: 47 - 57

9. On a possible mechanism responsible for the differential energy spectrum of relativistic electrons and non-linear low-frequency spectra of cosmic radio sources

   • S. Ya. Braude
   • È. A. Kaner

   OriginalPaper Pages: 59 - 70

10. Certain particular solutions of the clairaut equation

    • Paolo Lanzano

    OriginalPaper Pages: 71 - 83

11. Energy spectrum of HeII in a strong magnetic field and bound-bound transition probabilities

    • G. L. Surmelian
    • R. F. O'Connell

    OriginalPaper Pages: 85 - 91

12. The spectrum of RR Telescopii in 1968

    • L. H. Aller
    • R. S. Polidan
    • Gordon W. Wares

    OriginalPaper Pages: 93 - 110

13. A reappraisal of several extensive phenomena of the high galactic latitudes

    • K. H. Elliott
    • J. Meaburn

    OriginalPaper Pages: 111 - 122

14. The synthesis of close-binary light curves IV: An application to TX ursae majoris and MR Cygni

    • Graham Hill
    • J. B. Hutchings

    OriginalPaper Pages: 123 - 148

15. A two-beam, multi-mode, nebular-stellar photometer

    • C. Goudis
    • J. Meaburn

    OriginalPaper Pages: 149 - 157

16. The dark-side illumination of Saturn's rings

    • K. A. Hämeen-Anttila

    OriginalPaper Pages: 159 - 164

17. The comet — Meteor stream complex

    • D. A. Mendis

    OriginalPaper Pages: 165 - 176

18. Energy losses of galactic cosmic rays in the interplanetary medium

    • I. H. Urch
    • L. J. Gleeson

    OriginalPaper Pages: 177 - 185

19. The effects of stark broadening in the radio recombination line temperatures

    • Janet P. Simpson

    OriginalPaper Pages: 187 - 203

20. Imperfect fluid Friedmannian cosmology

    • M. Heller
    • Z. Klimek
    • L. Suszycki

    OriginalPaper Pages: 205 - 212

21. Extinction and scattering by several types of silicate sphere of radius 0.05–1.0μm, for the wavelength range 0.21–50μm

    • G. E. Bromage
    • K. Nandy
    • B. N. Khare

    OriginalPaper Pages: 213 - 224

22. Temperature dependent nuclear mass and its application to astrophysical problems

    • Teruaki Ohnishi

    OriginalPaper Pages: 225 - 239

23. ¹⁸⁷Re, recyclingR-process elements through stars, and the age of the Galaxy

    • Raymond J. Talbot Jr.

    OriginalPaper Pages: 241 - 249

24. Test for detection of fine structure of the solar wind velocity

    • N. A. Lotova
    • I. V. Chashey

    OriginalPaper Pages: 251 - 262

25. Abstracts of forthcoming papers

    Abstract Pages: 263 - 264