Across
- 3. The Catholic priest who proposed the idea of a once-small universe
- 4. A scientific explanation for observations of the natural world
- 8. An orbiting telescope named after the astronomer who found evidence of an expanding universe
- 10. The second most abundant element in the universe
- 11. the apparent change of wavelength in light from an object that moves away from an observer
- 12. Most ordinary matter is this element
Down
- 1. This kind of radiation is detectable everywhere we look in space
- 2. the distance light travels in one year
- 5. getting bigger
- 6. Redshift is measured by looking at the _________ of stars
- 7. The combination of substances a thing is made of
- 9. radiation still detectable from the early universe