The Life Cycle of Stars
The different phases stars go through during their existence
Before the Begining
The Beginning... of the End.
Supernovas - The Beginning again.
Light, Stars, and Christian Doppler.
Perceived Color: Now even though a star is blue, doesn't mean we'll see it as blue. This is caused by the Doppler Effect. The Doppler Effect happens when an object omitting waves on the electromagnetic spectrum moves, the waves bend around the object. As we know with visible light, the higher the frequency, the cooler the color. This happens to stars as well. Some stars are moving towards are earth, and others away. Now because the star is traveling to our earth, the light waves bend around it, sending a higher frequency to the direction its going, and a lower frequency the direction it's not going. This means, that the color of the star perceived by our eyes, on earth, depends on whether or not the star is travelling towards us. If the star is traveling towards us, the perceived color is blue, and if the star is traveling away from us, the perceived color is red.