Across
- 4. American physicist radio astronomer
- 5. what do people have to start the day
- 8. what is the matter that fills space called
- 9. what did edwin call his discoveries
- 12. who made the red shift
Down
- 1. what was the theory called that started space
- 2. what do people call space
- 3. American astronomer
- 6. what did people hear thought the radio
- 7. what do people call when they watch the stars
- 10. what do people fill balloons with
- 11. who solved the hardest equation