Across
- 2. A star _______ is a group of two or more stars that are held together by gravity.
- 4. An explosion so violent that the dying star becomes more brilliant than an entire galaxy.
- 11. A huge group of individual stars, star systems, star clusters, dust, and gas bound together by gravity
- 13. Loose groupings of bright, young stars.
- 14. A contracting cloud of gas and dust with enough mass to form a star
- 15. An ________ galaxy has a disorganized appearance and is typically smaller than other types of galaxies.
Down
- 1. A group of stars that seems to form a pattern as seen from Earth
- 3. A large cloud of gas and dust spread out over a large volume of space.
- 5. A spinning neutron star that gives off strong pulses of radio waves.
- 6. The enormously bright centers of distant galaxies
- 7. ________ galaxies have a bulge of stars at the center.
- 8. A star’s _____ determines that stars place on the main sequence and how long it will stay there.
- 9. A ______-mass star dies quickly because it consumes fuel rapidly.
- 10. A star system with two stars is called a _____ star.
- 12. A _____ is formed when a contracting cloud of gas and dust becomes so dense and hot that nuclear fusion begins.