Edwin Hubble

1. A relation between distance and radial velocity among extra-galactic nebulae
   1929/03/15 by Edwin Hubble · 25 citations
   Physics and Astronomy · #History and Developments in Astronomy #Stellar, planetary, and galactic studies #Historical Astronomy and Related Studies
2. A spiral nebula as a stellar system, Messier 31.
   1929/03/01 by Edwin Hubble, E. P. Hubble · 3 citations
   Physics and Astronomy · #Astronomy and Astrophysical Research #History and Developments in Astronomy #Stellar, planetary, and galactic studies
3. Extragalactic nebulae.
   1926/12/01 by Edwin Hubble · 1 citation
   Physics and Astronomy · #Astronomy and Astrophysical Research #Stellar, planetary, and galactic studies #History and Developments in Astronomy