1. Spectrophotometry of Comet Bradfield (1980t) during post-perihelion period

   • P. S. Goraya
   • B. K. Sinha
   • B. B. Sanwal

   OriginalPaper Pages: 3 - 9

2. Quantisation in stable gravitational systems

   • R. Wayte

   OriginalPaper Pages: 11 - 32

3. On the excess thermal fluxes of Titan and Saturn

   • E. M. Drobyshevski

   OriginalPaper Pages: 33 - 46

4. The construction of a general third-order planetary theory

   • Osman M. Kamel

   OriginalPaper Pages: 47 - 60

5. Lava flooding of ancient planetary crusts: Geometry, thickness, and volumes of flooded lunar impact basins

   • James W. Head

   OriginalPaper Pages: 61 - 88

6. The rotation rates of accreting planetesimals

   • G. P. Horedt

   OriginalPaper Pages: 89 - 92

7. A postulate leading to the Titius-Bode law

   • R. Louise

   OriginalPaper Pages: 93 - 96

8. Saturn's ringlets

   • J. A. Bastin
   • D. H. Smith

   OriginalPaper Pages: 97 - 100

9. CO in the IUE spectrum of Comet Bradfield (1979l)

   • P. S. Murty

   Letters to the Editor Pages: 101 - 104

10. An explanation of the persistence of the Great Red Spot of Jupiter

    • A. Kyrala

    Letters to the Editor Pages: 105 - 107

11. The evolution of the Earth-Moon system

    • D. G. Finch

    Letters to the Editor Pages: 109 - 114