 Gamow did this by assuming that the early universe was dominated by radiation rather than by matter.Most of the later work in cosmology is founded in Gamow's theory.He applied his model to the question of the creation of the chemical elements  and to the subsequent condensation of matter into galaxies, whose mass and diameter he was able to calculate in terms of the fundamental physical parameters, such as the speed of light "c", Newton's gravitational constant "G", Sommerfeld's fine-structure constant α, and Planck's constant "h".