1. Scanner observations of P/Halley (1982i)

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

   OriginalPaper Pages: 221 - 226

2. Third order uranus-neptune planetary theory

   • Osman M. Kamel
   • Abdel Aziz Bakry

   OriginalPaper Pages: 227 - 293

3. A comparison between panoramic photography and conventional aerial photography in terms of mapping accuracy

   • S. Piteri

   OriginalPaper Pages: 295 - 302

4. Radioactive heating and layered structure of cometary nuclei

   • S. Yabushita
   • K. Wada

   OriginalPaper Pages: 303 - 313

5. The temperature variations in the troposphere, stratosphere, and mesosphere of the Northern Hemisphere, 1965–1981

   • C. Varotsos

   Letter to the Editor Pages: 315 - 317

6. Comments on planetesimal rotations induced by collisions

   • G. P. Horedt

   Letter to the Editor Pages: 319 - 320

7. A reply to Horedt's comments on planetesimal rotations induced by collisions

   • S. Clairemidi

   Letter to the editor Pages: 321 - 323

8. Erratum

   Erratum Pages: 325 - 325