Slipher, V. M., V.M. Slipher to Edwin Hubble, March 3, 1922, in receiving Hubble's response on nebulae, 1922-03-03
Slipher thanks Hubble for his responses and sent him a copy of Wright's letter on nebulae, before encouraging Hubble to send him more research.…
Tags: Edwin Hubble, galaxies, galaxy, Nebula, nebulae, Rome, V.M. Slipher
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