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CHAPTER NEW CHAPTER Exploring Space the BIG idea People develop and use technology to explore and study space. 1.1 Some space objects are visible to the human eye. 1.2 Telescopes allow us to study space from Earth. 1.3 Spacecraft help us explore beyond Earth. 1.4 Space exploration benefits society. CHAPTER OUTLINE 1.1 KEY CONCEPT CHAPTER HOME Some space objects are visible to the human eye. • Gravity causes objects in space to be grouped together in different ways. • Stars form patterns in the sky. • The sky seems to turn as Earth rotates. VOCABULARY orbit solar system galaxy universe constellation SECTION OUTLINE 1.2 KEY CONCEPT CHAPTER HOME Telescopes allow us to study space from Earth. Each form of electromagnetic radiation provides different information about objects in space. Astronomers use different types of telescopes to gather visible light and other forms of radiation. VOCABULARY electromagnetic radiation spectrum wavelength telescope SECTION OUTLINE 1.3 KEY CONCEPT CHAPTER HOME Spacecraft help us explore beyond Earth. Astronauts can explore space near Earth. Spacecraft without crews carry instruments to other worlds. A flyby mission usually provides data from several bodies in space. Orbiters, landers, and probes gather data from one planet or body. VOCABULARY satellite space station lander probe SECTION OUTLINE 1.4 KEY CONCEPT CHAPTER HOME Space exploration benefits society. Space exploration has taught us about Earth’s development. It has also provided technology that has important uses on Earth. This boy communicates using technology developed by designers at NASA. VOCABULARY impact crater SECTION OUTLINE 1.1 KEY CONCEPT CHAPTER HOME Some space objects are visible to the human eye. I. Some space objects are visible to the human eye. A. We see patterns in the universe. VOCABULARY orbit solar system 1. Arrangement of the Universe galaxy 2. Constellations universe B. The sky seems to turn as Earth rotates. constellation C. The movements of planets and other nearby objects are visible from Earth. KEY CONCEPT SUMMARY 1.2 KEY CONCEPT CHAPTER HOME Telescopes allow us to study space from Earth. II. Telescopes allow us to study space from Earth. A. Light and other forms of radiation carry information about space. B. Astronomers use telescopes to collect information about space. 1. Visible-Light, Infrared, and Ultraviolet Telescopes VOCABULARY electromagnetic radiation spectrum wavelength telescope 2. Radio Telescopes 3. Telescopes in Space KEY CONCEPT SUMMARY 1.3 KEY CONCEPT CHAPTER HOME Spacecraft help us explore beyond Earth. III. Spacecraft help us explore beyond Earth. A. Astronauts explore space near Earth. 1. Moon Missions 2. Orbiting Earth VOCABULARY satellite space station lander probe B. Spacecraft carry instruments to other worlds. 1. Flybys 2. Orbiters 3. Landers and Probes 4. Combining Missions KEY CONCEPT SUMMARY 1.4 KEY CONCEPT CHAPTER HOME Space exploration benefits society. IV. Space exploration benefits society. VOCABULARY impact crater A. Space exploration has given us new viewpoints. 1. Surface Features 2. Atmosphere B. Space technology has practical uses. 1. Satellite Views of Earth 2. Technology Spinoffs KEY CONCEPT SUMMARY