GED® Science: Stars, Galaxies & the Universe

From the star next door to the edge of the observable universe — this course covers the astronomy portion of the GED® Earth & Space Science domain. You will learn how stars are born, live, and die; how the Hertzsprung-Russell diagram classifies stars by temperature and brightness; what our Milky Way galaxy looks like and how it fits into the larger universe; the evidence for the Big Bang and an expanding universe; and how astronomers measure cosmic distances. Every lesson uses real-world analogies, labeled diagrams, and GED®-style multiple-choice practice with full explanations.