Provides an introduction to galaxies, answering questions about what they are, where they come from, the Milky Way, the galactic halo, galaxy collisions, and related topics.
General Note
Includes index.
Content Note
What is a galaxy? -- Where did galaxies come from? -- How big is the Milky Way galaxy? -- Where are the Milky Way's stars formed? -- What kinds of nebula are in our galaxy? -- What lies in the core of the Milky Way? -- How big is the galactic halo? -- What is the local group? -- Can galaxies collide? -- What is an active galaxy? -- How many galaxies are there? -- What galaxies can I see at night?