Across
- 1. Highly magnetized rotating compact star
- 3. Radio waves, microwaves, infrared, visible, ultraviolet, X-ray and gamma radiation are all different forms of light
- 4. A very large star of high luminosity and low surface temperature
- 5. Millenium- 1000 years Century-100 years decade-10 years
- 7. Any massive self-luminous celestial body of gas
- 8. A giant cloud of dust and gas in space
- 10. Sprawling systems of dust, gas, dark matter
- 12. A powerful and luminous stellar explosion
- 13. The change in wave frequency during the relative motion between a wave source and its observer
Down
- 2. The distance light travels in one year
- 6. A hot ball of glowing gases at the heart of our solar system
- 7. The boundless three-dimensional extent to which objects and events have relative position and direction
- 9. Where gravity and density are infinite and space-time extends into infinity
- 11. Smaller than a star and doesn't give off light