Research Interests:

1. •Theoretical studies of comets, with emphasis on the structure,
   

    evolution  and activity of cometary nuclei, based on numerical 

    simulations.

1. •The structure and evolution of icy satellites.
   

1. •The thermal evolution of planet Mars
   

1. •Stellar evolution: the structure and evolution of single stars and cataclysmic variables, with emphasis on nova outbursts.