How do the planets compare to one another? What about stars and galaxies? How do the differences in celestial bodies affect life here on Earth? The Universe to Scale: Similarities and Differences in Objects in Our Solar System presents the latest information about the universe while also looking at how scientists built upon the research and theories of earlier generations. The book covers Next Generation Science Standards, includes the history of space travel, and discusses how these important missions have allowed astronomers to make accurate models of the planets, moons, suns, and more.