Big Bang Theory

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Across
  1. 2. The lightest and most common element in the universe, found in stars.
  2. 4. The science of studying stars, planets, and space.
  3. 5. A scientist who discovered that galaxies are moving away from each other.
  4. 10. A scientist who worked with Penzias to discover that same energy
  5. 13. A faint glow left over from when the universe first began.
  6. 16. A huge group of stars, gas, and dust held together by gravity.
  7. 17. A very light gas used to fill balloons so they float.
  8. 18. A famous scientist who helped us understand space, time, and gravity.
Down
  1. 1. A scientist who helped discover leftover energy from the early universe.
  2. 3. A scientist who had a different idea about how the universe began.
  3. 6. All kinds of light, including ones we can’t see, like radio waves and X-rays
  4. 7. Everything that exists, including stars, planets, and space.
  5. 8. All the colors of light we can see, like a rainbow.
  6. 9. The idea that the universe started a very long time ago from a tiny, hot point and has been growing bigger ever since.
  7. 11. A tool scientists use to split light into colors to learn about stars and space.
  8. 12. What makes things move, work, or change.
  9. 14. When light from something away from us looks more red.
  10. 15. When light from something moving closer to us looks more blue.