Across
- 2. Diagram a scatter plot of stars showing the relationship between them
- 6. a coherent, typically large body of matter with no definite shape
- 9. the complete range of all radiation
- 11. a group of stars
- 12. rotating neutron stars observed to have pulses of radiation
- 17. gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system, the Sun and planets formed by condenstation
- 18. how bright an object appears in the sky from Earth
- 20. a place in space where gravity pulls so much that even light can not get out
- 22. the process or result of joining two or more things together to form a single entity
- 23. the magnitude an object would have if it was located at a distance of 10 parsecs
- 24. Giant a very large star of high luminosity and low surface temperature
Down
- 1. the force that attracts a body toward thecenter of the earth
- 3. the explosion of a star
- 4. the apparent displacement in directionof an object
- 5. a small rock body orbiting the sun
- 7. typically has a disc with spiral "arms" that curve out from a dense central reason
- 8. a celestial object consisting of a nucleus of ice and dust
- 10. a cloud of dust and gas in space believed to develop into a star
- 13. a stellar core remnant composed mostly of electron degenerate matter
- 14. a supermassive black hole feeding on gas at the center of a distant galaxy
- 15. one of the small bodies of matter in the solar system
- 16. a property of matter by which it continues in its existing state of rest or motion
- 19. formed when a massive star runs out of fuel and collapses
- 21. Star a system of two stars in which two stars revolves around the other