The lecturer dealt with earth rotation, revolution and eclipses and why the moon gives the same face to earth. He also dealt with solar wind and the Aurora, the solar system and space travel to the moon and planet Mars, the physics of the sun, supernova explosion and making of the elements in the periodic table, type of galaxies, expansion of the universe, black holes and neutron stars, Einstein theory of relativity, beginning of the universe. It also included the probability of life on other planets and why particles have mass.