User:Hftf/Books/Astro/D

D

 * Dark energy
 * Dark galaxy
 * Dark matter halo
 * Dark matter
 * Dark nebulae
 * De Vaucouleurs' law
 * Deep sky object
 * Density wave theory
 * Disc (galaxy)
 * Disc galaxy
 * Discovery of cosmic microwave background radiation
 * Distance measures (cosmology)
 * Distance modulus
 * Doppler effect
 * Dwarf elliptical galaxy
 * Dwarf galaxy