My understanding of Stellar evolution was how the stars are formed, how they can even become a black hole, and what will happen to the Sun in the future. After watching this video, it opened my eyes to the stars' life. Learning stars are like humans. They are born and grow old and die like us. As I watched this video, I found out a star is a massive ball of gas that creates energy; I did not know they did. Also, the Sun is classified as a star; now it makes sense the Sun creates its energy with its nuclear fusion. The Sun emits 100 billion nuclear bomb explosions worth of energy every second.