Big Bang

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Across
  1. 6. Anything that has mass and takes up space.
  2. 8. Astronomer who discovered the universe is expanding.
  3. 10. All of space, time, matter, and energy.
  4. 13. A point of infinite density where the Big Bang began.
  5. 16. Light stretching to longer wavelengths as objects move away.
  6. 17. The process of the universe growing larger over time.
  7. 18. Faint radiation left over from the early universe.
Down
  1. 1. Distance light travels in one year.
  2. 2. Faint colour of objects moving closer, shortening wavelegnths.
  3. 3. A cloud of gas and dust where stars are born.
  4. 4. A massive system of stars, gas, and dust bound by gravity.
  5. 5. Proposed the idea of an expanding universe.
  6. 7. Energy emitted as waves or particles.
  7. 9. Theory describing the origin of the universe from a single point.
  8. 11. Faint colour of objects moving away.
  9. 12. Most abundant element in the universe
  10. 14. Second most abundant element in the universe.
  11. 15. Smallest unit of matter retaining chemical properties.