Across
- 5. Collection of galaxies, nebulae and stars
- 7. Theory that describes start of expanding universe
- 8. A unit of distance
- 9. Scientist who studies origin of universe
- 10. Slow motion of stars is due to earth's ________
- 11. Nursery of stars
- 12. Graph of absolute magnitude versus temperature
- 16. Effect describing relative motion
- 17. Law about distant galaxies moving faster away from earth
- 18. Magnitude 1 is _______ than 6
- 20. Planet outside the solar system
- 25. Brightness as seen from the earth
- 26. Mass of sun compared to other stars
- 28. Astronomer who suggested the geocentric model
- 29. Light displays in upper atmosphere
- 30. Famous telescope that collects data
Down
- 1. Energy emitted from sun as a result of nuclear _________
- 2. Shift due to movement of stars away from earth
- 3. Colour of stars is determined by this
- 4. Sun at the centre of this model
- 6. Age of universe is 15 _____ years
- 13. Earth at the centre of this model
- 14. End stage of a massive star
- 15. Actual brightness
- 19. Group of stars
- 21. Cloud of dust and gas
- 22. Effect that explains why frequency changes for a moving siren
- 23. Cooler patch on the sun
- 24. Brought atoms together for form stars
- 27. Part of sun visible during a solar eclipse