Across
- 5. Apparatus for recording and producing spectra for examination.
- 7. A barred spiral galaxy in which we live.
- 8. How people explain the universe began.
- 9. Everything including the energy of space.
- 11. Long period that waves move through.
- 13. An unmanned device sent into space.
- 16. The massive explosion of a star.
- 18. A place where gravity pulls so much that light cannot escape.
- 19. A regular repeating path in space that objects take around another.
- 20. A graph in which absolute magnitudes are plotted against their spectral types
- 23. The stellar core left behind after a dying star has exhausted
- 24. A self-luminescent body in space
Down
- 1. The distance light travels in one year.
- 2. Two atomic nuclei combine to make a larger one.
- 3. A period tides where the moon and sun are at right angles to each other.
- 4. A rotating circumstellar disk of dense gas surrounding a new star.
- 6. Electromagnetic radiation emitted by a source.
- 10. The tide during a new full moon
- 11. A device used to magnify distant images of objects.
- 12. Systems of stars that make up the universe.
- 14. An object that moves around a larger object.
- 15. The change in wavelength of frequency.
- 17. A quantity representing the amount of matter in a given object.
- 21. Force that exists between all objects in the universe.
- 22. An enormous cloud of dust acting as a nursery for new stars.
- 23. A force acting on an object due to gravity.