Author: Physics And Universe

Dark matter is material that gravitates but does not emit very much light. It is undetectable by...

Stars revolve around the center of galaxies at a constant speed over a large range of distances...

E. Hubble determined that there is a relation between the distance of various galaxies and their...

There have been two leading models for the spiral structure of Galaxies: Star formation caused by...

The classification of galaxies was proposed by Edwin Hubble in 1936, popularly known as tuning...