Across
- 4. 25. Theory that the universe was originally a singularity and is expanding at a constant rate
- 7. 10. An object in space that produces light and is held together by gravity
- 8. 13. A device that magnifies stars and planets so they can be observed
- 11. 16.A device that identifies materials by observing specific wavelengths of light
- 12. 1. All existing matter and space
- 13. 26. A small, dense star about the size of a planet
- 18. 2. A large group of stars
- 20. 5. The amount of matter in an object
- 22. 22. A rotating disk of gas and dust orbiting a young star
- 24. 6. The amount of gravitational force on an object
- 25. 24. A tide after a 1st or 3rd quarter moon where the difference between high and low is least
- 26. 3. The galaxy that we are in
Down
- 1. 21. A large cloud of gas and dust in space
- 2. 8. The distance that light travels in a year
- 3. 4. Attractive force between all matter
- 5. 19. Gravitational pull on the Earth created by the moon
- 6. 11. A diagram comparing stars' brightness to their temperature (remember to hyphenate)
- 9. 14. Anything that orbits an object in space
- 10. 15. A spacecraft designed to transmit information about its environment
- 14. 20. Change in a wave's frequency as it moves relative to the observer
- 15. 17. The wavelengths of light that a material emits
- 16. 7. An object with so much gravity that light is pulled in
- 17. 9. Reaction where atoms combine to form different elements
- 19. 18. An explosion created by a star
- 21. 23. A tide after a new or full moon where the difference between high and low is greatest
- 23. 12. When an object in space revolves around another object due to gravitational pull.