1. Probabilities of Perception and Population Index in Visual Observations of Meteor Showers

   • Guang-Jie Wu
   • Guang-Yu Li

   OriginalPaper Pages: 1 - 18

2. The Anti-Tail of Comet C/1995 O1 (Hale–Bopp) in 1997/1998

   • Hermann Boehnhardt

   OriginalPaper Pages: 19 - 35

3. Temporal Variations in the Second-Degree Stokes Tesseral Geopotential Coefficients from Topex/Poseidon Altimetry

   • Milan Burša
   • Steve Kenyon
   • Marie Vojtíŝková

   OriginalPaper Pages: 37 - 64

4. Electric Discharges in the Protoplanetary Nebula as a Source of Impulse Magnetic Fields to Promote Dust Aggregation

   • I. Túnyi
   • P. Guba
   • M. Timko

   OriginalPaper Pages: 65 - 74