The immense universe holds a complex progression of celestial bodies. From the initial formation of stars and galaxies billions of years in the past, to the everlasting transformation of planets and comets, each https://www.youtube.com/watch?v=sMk4u49wsSY&list=PLZyUCudMkqcM4mk4_dH3OwD3Vix21ySC0&index=21&pp=iAQB