
Space & PhysicsJune 1, 1983
Dark Matter in Spiral Galaxies
It appears that much of the matter in spiral galaxies emits no light. Moreover, it is not concentrated near the center of the galaxies

Dark Matter in Spiral Galaxies
It appears that much of the matter in spiral galaxies emits no light. Moreover, it is not concentrated near the center of the galaxies

The Dynamics of the Andromeda Nebula
The stars, dust and gas of this spiral galaxy are all in motion. Spectrographic observations show that they do not simply wheel around the galactic center but move in a quite complex pattern