1. Chapter 22 Exploring Space

2. Electromagnetic waves carry energy through space and matter.

3. Electromagnetic radiation includes radio waves, visible light, gamma rays, X rays, ultraviolet light, infrared waves and microwaves.

4. Electromagnetic spectrum –electromagnetic radiation arranged by wavelength

6. Optical telescopes –use light to produce magnified images.

7. Refracting telescopes –have convex lenses

8. Reflecting telescope –uses concave mirror.

9. Optical telescopes are often located in buildings called observatories, which often have roofs that can be opened for viewing.

12. Radio telescope –studies radio waves that travel through space.

14. Section 2: Early Space Missions

15. Early space missions allowed astronomers to study space in ways not possible using telescopes

16. Special motors that don’t require air are called rockets.

17. A satellite –any object that revolves around another object in an orbit, or curved path.

18. In 1957 the former Soviet Union launched the first artificial satellite, Sputnik I.

19. Today thousands of communication, scientific, and weather satellites orbit Earth.

20. A space probe gathers and transmits information to Earth.

21. Voyager 1 and Voyager 2 are exploring space beyond the solar system.

22. Pioneer 10, first probe to travel through an asteroid belt.

23. Galileo, launched in 1989, studied Jupiter and two of its moons, Europa and Io.

24. United States began race for the Moon in the 1960s.

25. First step in program to reach the Moon began with Project Mercury.

26. In 1961, Alan B. Shepard became the first U.S. citizen in space.

27. In 1962, John Glenn became the first U.S. citizen to orbit Earth.

30. Section 3: Current and Future Space Missions

32. Space stations –permanent places in space for humans to live and work.

34. Former Soviet Union Mir housed one socmonaut for more than a year at a time.

35. The United States and Russia have cooperated in nine joint space missions.

38. In 2002, Odyssey confirmed that Martian soil contained frozen water.