1. Announcement of change of title

   Announcement Pages: iii - iii

2. Sky twilight brightness and colour during high solar activity

   • S. Nawar

   OriginalPaper Pages: 99 - 105

3. Solar activity and atmospheric attenuation effects on the visibility of stars and planets during twilight

   • S. Nawar

   OriginalPaper Pages: 107 - 116

4. The wake model for azimuthal brightness variations in Saturn's A-ring

   • Hannu Karttunen

   OriginalPaper Pages: 117 - 120

5. Galactic perturbations on nearly-parabolic cometary orbits

   • John Byl

   OriginalPaper Pages: 121 - 137

6. Models of the internal structure of Venus

   • V. N. Zharkov

   OriginalPaper Pages: 139 - 175

7. Spectres d'absorption dans le proche ultraviolet de CS₂ et SO₂ entre 200 et 300K

   • B. Leroy
   • P. Rigaud
   • G. Le Bras

   OriginalPaper Pages: 177 - 183

8. A model of neptune according to the Savić-Kašanin theory

   • Vladan Čelebonović

   OriginalPaper Pages: 185 - 189

9. Expected and observed profiles of CO and CS in cometary spectra

   • K. S. Krishna Swamy

   OriginalPaper Pages: 191 - 193

10. Abnormally dark lunar eclipse on december 30, 1982

    • N. Sekiguchi

    Letter to the Editor Pages: 195 - 198

11. Oxygen isotopic anomaly and solar nebular photochemistry

    • Y. Kitamura
    • M. Shimizu

    Letter to the Editor Pages: 199 - 202

12. Bibliography

    • Z. Kopal
    • M. Moutsoulas
    • F. B. Waranius

    Legacy Pages: 203 - 222