Across
- 3. Extremely bright, distant objects powered by massive black holes.
- 5. The stretching of light that shows galaxies are moving away.
- 7. Massive collections of stars, dust, and gas held together by gravity.
- 9. Colorful clouds of gas and dust where new stars are born.
- 10. Rapidly spinning neutron stars that emit beams of radiation
- 11. Another word for the entire universe.
- 13. A method for measuring star distance by observing slight position shifts.
Down
- 1. waves Ripples in space-time caused by massive cosmic collisions.
- 2. Sudden brightening events caused by explosions on the surface of a star.
- 4. Way The galaxy that contains our Solar System.
- 6. Planets that orbit stars outside our Solar System.
- 8. Powerful star explosions that can outshine whole galaxies.
- 12. Huge balls of hot gas that produce light and heat.