1. Gravitational potential energy of a pair of overlapping galaxies

   • Farooq Ahmad

   OriginalPaper Pages: 1 - 9

2. Self-similar flow behind a spherical shock with varying strength in an inhomogeneous self-gravitating medium

   • S. N. Ojha
   • Onkar Nath

   OriginalPaper Pages: 11 - 17

3. Expansion theory for the elliptic motion of arbitrary eccentricity and semi-major axis

   • Mohamed Adel Sharaf

   OriginalPaper Pages: 19 - 38

4. The luminosity of red supergiants in the andromeda galaxy

   • Yu. N. Efremov
   • G. R. Ivanov

   OriginalPaper Pages: 39 - 43

5. An exact similarity solution in radiation magneto-gas-dynamics for the flows behind a spherical shock wave

   • J. P. Vishwakarma
   • R. C. Srivastava
   • Arun Kumar

   OriginalPaper Pages: 45 - 52

6. The evolution of two types of pulsars

   • Zu-Gan Deng
   • Jie-Hao Huang
   • Xiao-Yang Xia

   OriginalPaper Pages: 53 - 61

7. An analytic solution for propagation of blast waves in stellar interiors

   • O. S. Srivastava
   • A. H. Khan
   • D. Singh

   OriginalPaper Pages: 63 - 72

8. Effects of rotation and tidal distortions on the periods of adiabatic oscillations of composite models of stars

   • C. Mohan
   • S. R. Agarwal

   OriginalPaper Pages: 73 - 94

9. Bivariational calculations for radiation transfer in an inhomogeneous participating medium

   • S. A. El Wakil
   • H. M. Machali
   • M. T. Attia

   OriginalPaper Pages: 95 - 105

10. Velocity gradients perpendicular to the galactic plane in the solar vicinity

    • G. A. Pellegatti Franco
    • R. J. Quiroga

    OriginalPaper Pages: 107 - 122

11. Nonlinear shift of wave parameters of whistlers in the ionosphere

    • S. N. Paul
    • G. C. Das
    • B. Chakraborty

    OriginalPaper Pages: 123 - 129

12. From beyond the Big Bang to the end of the Planck era of the Universe

    • Pavel Voráček

    OriginalPaper Pages: 131 - 141

13. A new period and period trend of IZ Persei

    • R. K. Srivastava

    OriginalPaper Pages: 143 - 147

14. The determination of the gravitational potential of arbitrary mass distribution

    • R. Tschaepe

    OriginalPaper Pages: 149 - 158

15. Whistlers as a diagnostic technique in the lower ionosphere

    • G. C. Das
    • A. K. Sur
    • B. Chakraborty

    OriginalPaper Pages: 159 - 167

16. Heat transfer in unsteady MHD couette flow of an electrically conducting, viscous, incompressible rarefied gas

    • H. L. Agrawal
    • R. Nath
    • R. P. Singh

    OriginalPaper Pages: 169 - 180

17. Evidence for the free precession of a neutron star

    • K. J. Orford

    OriginalPaper Pages: 181 - 186

18. Apsidal rotation in the eclipsing binary AG Persei

    • Edith J. Woodward
    • Robert H. Koch

    OriginalPaper Pages: 187 - 193

19. Our galaxy — A former seyfert?

    • Wolfgang Kundt

    Letter to the Editors Pages: 195 - 201

20. Statistical relationship between sunspots and major flares

    • T. Ataç

    Letter to the Editors Pages: 203 - 208

21. Book reviews

    • Jiří Horáček
    • Jiří Langer
    • M. Éliaš

    BookReview Pages: 209 - 212

22. List of forthcoming papers

    Legacy Pages: 213 - 213