1. Expansion of the mutual distance between two planets raised to any negative power

   • Osman M. Kamel

   OriginalPaper Pages: 239 - 277

2. Laboratory simulation of volatilisation from melts induced by micrometeoroid impacts

   • M. D. Nussinov
   • V. V. Vysochkin
   • V. I. Feldman

   OriginalPaper Pages: 279 - 304

3. Factors affecting the motion of interplanetary dust particles

   • L. Grimshaw

   OriginalPaper Pages: 305 - 310

4. The orbital evolution of comet Bowell (1980b)

   • L. Buffoni
   • M. Scardia
   • A. Manara

   OriginalPaper Pages: 311 - 315

5. On the relationships between impact crater diameters and projectile kinetic energy

   • J. W. Bond

   OriginalPaper Pages: 317 - 321

6. A preliminary analysis of lunar extra-mare basalts: Distribution, compositions, ages, volumes, and eruption styles

   • J. L. Whitford-Stark

   OriginalPaper Pages: 323 - 338

7. A supposed new law for planetary distances

   • Ennio Badolati

   Letter to the Editor Pages: 339 - 341