TY - BOOK AU - Hubble, Edwin TI - The Realm of the Nebulae SN - 978-0-300-18712-0 U1 - 523.113.5 PY - 2013/// CY - London PB - Yale University Press KW - NEBULAEÌ N1 - Introduction - The Exploration of Space - Family Traits of Nebulae - The Distribution of Nebulae - Distances of Nebulae - The Velocity-Distance Relation - The Local Group - The General Field - The Realm of the Nebulae ER -