1. Lois exponentielles de distance pour les systèmes de satellites

   • Vladimir Pletser

   OriginalPaper Pages: 193 - 210

2. The boundary to the solar system as set by a hypothetical Solar companion

   • J. J. Rawal

   OriginalPaper Pages: 211 - 215

3. Radarclinometry

   • Robert L. Wildey

   OriginalPaper Pages: 217 - 247

4. Infrared heating of Comet Halleys atmosphere

   • M. L. Marconi
   • D. A. Mendis

   OriginalPaper Pages: 249 - 256

5. Scanner observations of comet P/Crommelin 18181

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

   OriginalPaper Pages: 257 - 262

6. The effect of the Galaxy on cometary orbits

   • John Byl

   OriginalPaper Pages: 263 - 273

7. Gravity studies of Aphrodite Terra on Venus

   • Peter Janle
   • Dieter Jannsen

   OriginalPaper Pages: 275 - 287

8. Some predictions on the nature of Comet Halley

   Letter To The Editor Pages: 289 - 293

9. A model of the 2–4Μm spectrum of Comet Halley

   • D. T. Wickramasinghe
   • F. Hoyle
   • S. Al-Mufti

   Letter to the Editor Pages: 295 - 299