Chapter 5 Exploring Space

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Across
  1. 1. People trained to travel and work in space.
  2. 7. A tool that spreads light into colors so scientists can learn what stars and other objects are made of.
  3. 9. whatever carries the wave
  4. 10. A back and forth motion that repeatedly follows the same path
  5. 14. a single rise or depression in a series of waves
  6. 15. The planet we live on; the only known planet with life.
  7. 16. Very dense, fast-spinning stars that give off regular pulses of radio waves, like a cosmic lighthouse.
  8. 18. An American scientist known as the father of modern rocketry; he built and launched the first liquid-fuel rocket.
Down
  1. 2. An object that moves around a planet; it can be natural (like the Moon) or man-made (used for communication or weather).
  2. 3. The largest planet in the solar system; a gas giant with many moons.
  3. 4. (1564-1642)the first astronomer to make extensive use of a telescope to study the heavens
  4. 5. The largest moon in the solar system; it orbits Jupiter.
  5. 6. The second planet from the Sun; very hot and covered with thick clouds.
  6. 8. A device to make distant objects appear clearer, brighter, or closer
  7. 11. low point in a wave
  8. 12. Saturn’s largest moon; it has a thick atmosphere.
  9. 13. The planet closest to the Sun; very hot during the day and very cold at night.
  10. 17. A gas giant known for its large, beautiful rings.