density-wave theory - (n.)
The explanation of spiral structure of galaxies as the effect of a wave of compression that rotates around the center of the galaxy and causes the formation of stars in the compressed region.
detection - (n.) ...
17 Density-wave theory holds that the spiral arms seen in our own and many other galaxies are waves of gas compression and star formation moving through the material of the galactic disk.
 See also: Bright Stars, Black Dwarf, Sky, Night, Asteroid Belt
  
|
RSS
