The Sun contains 99.8% of the total mass of the Solar System, so it would take about 109 Earths to cover its diameter. Even so, and as strange and unusual as the idea may seem, our star is tiny compared to some "monsters" out there. But what's the largest star in the known Universe? What do we call "the biggest star"? And, what does the light and heat of a star depend on? "Cielos despejados" explains it to you.