Across
- 4. large cloud of gas and dust from which the sun, planets, and other solar system bodies formed
- 8. graph in which the absolute magnitudes of stars are plotted against their spectral types
- 11. one in which two stars orbit around a common center of mass
- 12. We often see these as streaks of light in the sky
- 13. An object's tendency to resist a change in motion
- 16. This is formed when a massive star runs out of fuel and collapses
- 17. the brightness measured by an observer at a specific distance from the object
- 19. the brightest star in the night sky
- 20. a supermassive black hole feeding on gas at the center of a distant galaxy
- 22. the apparent magnitude an object would have if it were located at a distance of 10 parsecs
- 23. the name of a large star with high luminosity & low surface temperature
- 24. the observed displacement of an object caused by the change of the observer's point of view
- 25. cosmic snowballs of frozen gases, rock, and dust that orbit the Sun
Down
- 1. rotating neutron stars observed to have pulses of radiation at very regular intervals
- 2. the explosion of a star
- 3. a place in space where gravity pulls so much that even light can not get out
- 5. a group of stars that forms a particular shape in the sky and has been given a name
- 6. The complete range of all types of radiation that has both electric and magnetic fields and travels in waves
- 7. a cloud of gas and dust in space believed to develop into a star
- 9. any of millions of small celestial objects revolving around the sun
- 10. the stellar core left behind after a dying star has exhausted its nuclear fuel
- 14. This typically has a rotating disc with spiral 'arms' that curve out from a dense central region
- 15. This is often compared to the pull of a magnet
- 18. typically large body of matter with no definite shape
- 21. the process or result of joining two or more things together to form a single entity