Across
- 2. A massive system of stars, gas, dust, and dark matter held together by gravity.
- 4. A region in space where gravity is so strong that nothing, not even light, can escape.
- 6. A massive stellar explosion that occurs at the end of a star’s life cycle.
- 8. The increase in wavelength of light from distant galaxies, indicating they are moving away.
- 9. An extremely luminous active galactic nucleus powered by a supermassive black hole.
- 11. The edge of a black hole beyond which nothing can return, also called the event horizon.
- 12. The fundamental force that attracts bodies toward one another in space.
- 14. The distance light travels in one year, about 5.88 trillion miles.
Down
- 1. A planet that orbits a star outside our solar system.
- 3. A highly magnetized rotating neutron star that emits beams of radiation.
- 5. A vast cloud of gas and dust in space, often a stellar nursery.
- 6. The core point in a black hole where density becomes infinite.
- 7. The prevailing theory for the origin of the universe, beginning from a single point.
- 10. The universe seen as a well-ordered whole; the entirety of space and time.
- 13. A type of matter that does not emit light but has gravitational effects.