This is a collection of National Geographic's most popular explorations of space. Using cutting-edge science, Inside the Milky Way constructs a 3-D state-of-the-art CGI model of our galaxy. Monster Black Holes explores what happens to matter when it comes too close to one, and wonders whether our Milky Way galaxy will one day end when the black hole at the galaxy's center explodes. Hubble's Amazing Universe journeys into the far ends of the universe in amazing images, and looks at the mission to save the telescope. Journey to an Alien Moon goes to Europa--an icy moon of Jupiter--to answer the basic question: are we alone in the universe? Asteroids: Deadly Impact examines the work of geologist Eugene Shoemaker and his wife Carolyn. They have remapped the heavens, discovering more than 30 comets and hundreds of asteroids. Now that we know what's out there, how can we defend ourselves?.