There are many cycles throughout the universe. Stars condense by gravity out of clouds of molecules of the least massive elements until nuclear fusion of the lower mass elements into heavier ones begins to occur.
Fusion releases great amounts of energy over millions of years.
Eventually, some stars explode, producing clouds of heavy elements from which other stars and planets could later condense. Predict the relative stage in respect to a star's life cycle, given the characteristics of the star. There is order in the universe. The stars differ from each other in size, temperature, and age, but they appear to be made up of the same elements that are found on the earth and to behave according to the same physical principles. Most stars are in systems of two or more stars orbiting around one another.