Our galaxy, the Milky Way, and others, are so vast and varied that there is virtually no limit to what we can learn about them. This comprehensive book aligns with the Next Generation Science Standards focusing on the universe and its stars, and offers readers a detailed and scientific look at nearly all facets of the Milky Way and galaxies in general. Readers will study the different types of galaxies and their behaviors, the stars that compose them, and the interstellar medium. Any serious student of the space sciences will appreciate this fascinating and all-encompassing book.