Across
- 4. how bright a star appears to us is called ____ magnitude
- 8. pass through the atmosphere and hits Earth's surface
- 9. largest and brightest stars
- 12. two or three stars held together by gravity is called ______ star group
- 15. stars are glowing ____ of gases that produce light
- 18. scientific study of stars
- 20. stars that regularly or repeatedly change in magnitude are called _____ stars
- 22. closest star to Earth
- 23. a cloud of dust, gases, and debris
- 24. a group of stars that form a pattern
- 26. rocky object that enters Earth's atmosphere and lights up
- 27. made of irregularly shaped pieces of rock, metal, and dust
Down
- 1. contains two stars is called ____ system
- 2. smaller stars, like our sun, are ___ stars
- 3. telescope that break starlight into its colors
- 5. chunk of frozen gases, water, and dust that orbits the sun
- 6. a large group of stars held together by gravity
- 7. telescopes that bend light to make objects seem larger
- 10. a neutron star that spins rapidly on its axis
- 11. when a massive supergiant star collapses and disappears from space
- 13. measurement of a star's apparent movement over time
- 14. a huge star system that covers many light-years of space
- 16. brightness of a star
- 17. how bright the star really is called _____ magnitude
- 19. rocky object in space
- 21. hottest stars have this color
- 25. existing star flares up and becomes brighter than normal