Succeeding my article “Determination of Wave Source while Wave Source, Medium, and Observer Move Relatively”, I have re-explained the stellar aberration experiment. This present article has proved in all aspects the light propagation needing medium and the possibility of the existence of “Ether”. In which, Michelson-Morley Experiment and Fizeau Experiment are re-explained with new drag-theory, and Binary-Star Observation is explained with wave-model. And I add a large amount of physical theoretical and experimental basis. such as the Doppler Effect, the synchrotron experiments, synchronous satellite communications. Meanwhile, this article has proved that the classical wave theory is correct in the macroscopic physical field and the particle-model of light is available in the microscopic physical field.
ether, medium , star aberration, Michelson-Morley, Fizeau, Binary-star, Special Theory of Relativity, wave-model, particle-model, Doppler Effect，synchronous cyclotron，GPS，satellite communication，synchronous satellite.