Across
- 1. A cloud of gas and dust in space where stars can form
- 4. A large object that orbits a star and does not produce its own light
- 5. A massive ball of gas that produces energy through nuclear fusion
- 8. The rate at which work is done
- 10. An icy object that forms a glowing tail near the Sun
- 13. A small rocky object orbiting the Sun
- 14. Mass times velocity
- 17. All space matter and energy that exists
- 18. The force that attracts objects with mass toward each other
- 21. The number of waves passing a point per second
- 25. An object's tendency to resist changes in motion
- 26. A wave of energy like light radio or X rays that travels through space
- 27. The ability to do work or cause change
- 28. The amount of matter in an object
- 29. When a force causes an object to move over a distance
Down
- 2. A region in space where gravity is so strong that light cannot escape
- 3. A push or pull on an object
- 6. A tool used to observe distant objects in space
- 7. The range of different wavelengths of light
- 9. The distance light travels in one year
- 11. Speed in a given direction
- 12. A region where gravity affects objects around it
- 15. The process of combining small nuclei to release energy
- 16. The distance between repeating points on a wave
- 18. A large system of stars gas and dust held together by gravity
- 19. The rate at which velocity changes over time
- 20. A force that opposes motion between surfaces in contact
- 22. The force of gravity acting on an object
- 23. The curved path of an object around another due to gravity
- 24. A disturbance that transfers energy through space or matter