International Center for Relativistic Astrophysics Network together with the National Academy of Sciences of Belarus organize an international conference to be held in Minsk, Belarus in April 20-24, 2020. Exceptionally wide research interests of Ya. B. Zeldovich ranging from chemical physics, elementary particle and nuclear physics to astrophysics and cosmology provide the topics to be covered at the conference: Early cosmology, large scale structure, cosmic microwave background; Neutron stars, black holes, gamma-ray bursts, supernovae, hypernovae; Ultra high energy particles; Gravitational waves.