An overview of the structure and nature of objects that make up the universe. Includes diagrams, fun facts, glossary, resource list, and index.

Includes index.

What is the universe? -- What is the shape and size of the universe? -- Focus on : the secrets of light -- How do astronomers use redshift to determine distance? -- Where did the universe come from? -- How old is the universe? -- Focus on : the origin of everything -- What is the cosmic background radiation? -- What is matter? -- What is antimatter? -- What is energy? -- Focus on : big bang on Earth -- What are magnetic fields? -- What are galaxies? -- What are clusters and superclusters? -- What are filaments, walls, and voids? -- Focus on : mysterious blobs in a baby universe -- What role does the force of gravity play in the universe? -- Focus on : gravity-curves in space time -- What is dark matter? -- What is dark energy? -- What is a constellation? -- What is the celestial sphere? -- How do astronomers map the universe? -- Focus on : the universe in 3-D -- How fast is the universe expanding? -- What is the fate of the universe?.