Across
- 3. Radiation from the Big Bang (abbreviation)
- 4. Lengthening of light waves from distant stars
- 8. The height of a wave
- 10. The distance between two waves
- 11. A fixed point in the interior of an ellipse
- 12. A regular oval shape
- 13. The universe originated billions of years ago
Down
- 1. One of the most abundant atoms in the universe
- 2. Number of waves that pass each second
- 5. Attractive forces present between two objects
- 6. First person to say the universe is expanding
- 7. How “stretched out” an ellipse is.
- 9. Information that provides support for an idea