~~Black Holes~~

[Chuck]

Before a star explodes it becomes red giant. Why its color is red at that time?

 

[barney]

Because the matter that its made out of absorbs light on other frequencys than red and reflects Red frequencys.

 

[Chuck]

Because the matter that its made out of absorbs light on other frequencys than red and reflects Red frequencys.

And in what occasions that happens? One is expanding star of course.