The beauty of the universe is not limited to what is immediately visible to our eyes. The study of the stars and planets pushes the frontiers of knowledge in every direction. When we investigate space, we look into our deep past. Astronomy reveals the story of our own origins by exploring the origins of our planet, sun, and galaxies. Our Sky Island features two of the largest telescopes in the Southwest! The Steward Observatory is located at the Mt. Lemmon SkyCenter, which offers multiple tours. To book yours, click the link below. Hurry! They fill up fast!