Big Bang Vocab

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Across
  1. 2. The most common element in the universe
  2. 4. The study of space, stars, and planets
  3. 5. Showed that galaxies are moving away, meaning the universe is expanding
  4. 10. an American scientist who studied space
  5. 13. Leftover heat from the Big Bang, like a faint glow filling space
  6. 16. A huge group of stars, gas, and dust held together by gravity
  7. 17. The second most common element, also found in balloons on Earth
  8. 18. A scientist who helped explain how space and time work
Down
  1. 1. an American scientist who studied space
  2. 3. Had a different idea about how the universe works
  3. 6. All kinds of light, including ones we can’t see, like X-rays and radio waves
  4. 7. Everything that exists—space, stars, planets, and galaxies
  5. 8. the range of visible light
  6. 9. how astronomers explain the way the universe began
  7. 11. A tool scientists use to split light into colors to learn about stars
  8. 12. What makes things happen, like light and heat traveling through space
  9. 14. something is moving away from us
  10. 15. something is moving closer to us