Stars are hot bodies of glowing gas that start their life in Nebulae. They vary in size, mass and temperature, ranging from 450x smaller to over 1000x larger than that of the Sun. Now, the color of a star is determined by its temperature, the hottest stars are blue and the coolest stars are red. The energy produced by the star is by nuclear fusion in the star’s core. The brightness is measured in magnitude, the brighter the star the lower the magnitude goes down. They are two types of stars, Low Mass and Massive. These two stars go through an evolution process which is somewhat similar, only difference is how it’s life ends.
In the very beginning, the star is born in an area of high density Nebula, which is the stellar nursery that contains