A demonstration of why galaxies appear to be moving away from us, Hubble’s Law, and how this is due to the expansion of the universe.
Published 04/24/08
A demonstration of how pulsars form, and how they are detected from Earth.
Published 04/13/08
A demonstration of what a spiral density wave is, and how it moves through a Galaxy. An exploration of how clusters of stars form within spiral arms, and why luminous blue stars are only found within spiral arms, is also discussed.
Published 04/05/08