A group of astronomers from Toruń in Poland have successfully completed a survey of the Milky Way plane. They searched for gas clouds, where there was a maser reinforcement of the OH molecule. They saw seven new sources - each of them brings scientists closer to the process by which massive stars are born. "It is like listening to the buzzing of a mosquito during a loud concert," backstage observations are recapitulated by Prof. Anna Bartkiewicz.