Across
- 3. - An apparent shift in the position of an object when viewed from different locations
- 6. - A large cloud of dust and gas in space
- 8. star - a star system with two stars
- 12. glaxy - a galaxy shaped like a round or flattened ball, generally containing only old star.
- 13. dwarf - A small, hot, dim star that is the leftover center of an old star
- 14. Bang - The initial explosion that resulted in the formation and expansion of the universe
- 15. sequence - a diagonal area on an H-R diagram that includes more than 90 percent of all stars
- 19. matter - matter that does not give off electromagnetic radiation but is quite abundant in the universe
- 20. - A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
- 21. brightness - the brightness a star would have if it were at a standard distance from earth
- 22. radiation - energy that travels through space in the form of waves
Down
- 1. law - The observation that the farther away a galaxy is, the faster it is moving away.
- 2. energy - a mysterious force that appears to be causing the expansion of the universe to accelerate
- 3. - A rapidly spinning neutron star that produces radio waves
- 4. cluster - a few thousand loosely packed stars
- 5. - An enormously bright, distant galaxy with a giant black hole at its center
- 7. diagram - a graph relating the surface temperatures and absolute brightness of stars
- 8. hole - An object in space whose gravity is so strong not even light can escape.
- 9. galaxy - a galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
- 10. star - the small, dense remains of a high-mass star after a supernova
- 11. cluster - a large, round, densely-packed grouping of older stars
- 16. galaxy - A galaxy that does not have a regular shape
- 17. - the brilliant explosion of a dying supergiant star
- 18. brightness - the brightness of a star as seen from Earth
- 23. background radiation - The electromagnetic radiation left over from the big bang