1. Preferential perihelion and aphelion distances, and planetary formation

   • Nils Aall Barricelli

   OriginalPaper Pages: 1 - 33

2. Geology of large impact craters on Ganymede: Implications on thermal and tectonic histories

   • Pierre G. Thomas
   • Olivier P. Forni
   • Philippe L. Masson

   OriginalPaper Pages: 35 - 53

3. The historical records of Halley's comet in China

   • D. C. Wang
   • S. M. Gong

   BriefCommunication Pages: 55 - 57

4. On the origin of Triton

   • Vladan čelebonović

   OriginalPaper Pages: 59 - 63

5. Dependence of the aurora borealis occurrences on the solar-terrestrial parameters

   • Y. Liritzis
   • B. Petropoulos

   OriginalPaper Pages: 65 - 75

6. Absolute spectrophotometry of Comet kohoutek 1973f during post-perihelion passage

   • P. S. Goraya
   • B. S. Rautela
   • B. B. Sanwal

   OriginalPaper Pages: 77 - 91

7. Further considerations on contracting solar nebula

   • J. J. Rawal

   OriginalPaper Pages: 93 - 100