On the night of September 17, 1912 V. Slipher, after a seven-hour exposure range was Andromeda, in which the first measured its speed using the Doppler effect. The astronomer did not believe it himself. The speed was tremendous - the nebula is approaching us at 300 kilometers per second. He got a few pictures of the spectra, confirm the results, and only then published an article. The speed of the Andromeda nebula about ten times higher than the normal speed of the stars. V. Slipher knew came across something amazing. He wrote in his article: "The expansion of the work to other objects can give the result of fundamental importance."