Lois exponentielles de distance pour les systèmes de satellites Vladimir Pletser OriginalPaper Pages: 193 - 210
The boundary to the solar system as set by a hypothetical Solar companion J. J. Rawal OriginalPaper Pages: 211 - 215
Infrared heating of Comet Halleys atmosphere M. L. MarconiD. A. Mendis OriginalPaper Pages: 249 - 256
Scanner observations of comet P/Crommelin 18181 P. S. GorayaB. B. SanwalB. S. Rautela OriginalPaper Pages: 257 - 262
A model of the 2–4Μm spectrum of Comet Halley D. T. WickramasingheF. HoyleS. Al-Mufti Letter to the Editor Pages: 295 - 299