Across
- 2. A massive system of stars, gas, and dust held together by gravity.
- 6. The study of life and its potential beyond Earth.
- 7. The curved path of an object around a star, planet, or moon.
- 12. A small rocky body orbiting the sun, mostly between Mars and Jupiter.
- 13. A stellar explosion marking the death of a massive star.
- 15. An icy body that develops a glowing tail as it nears the sun.
- 16. Related to the moon.
- 18. A planet that orbits a star outside our solar system.
- 20. An extremely luminous and energetic galactic core powered by a black hole.
Down
- 1. A rotating neutron star that emits regular radio pulses.
- 3. A fragment of rock or metal from space that reaches Earth’s surface.
- 4. wind A stream of charged particles released by the sun.
- 5. The universe considered as an orderly, harmonious system.
- 8. An optical instrument for observing distant objects in space.
- 9. A point in space-time where gravity becomes infinite, like in a black hole.
- 10. A massive cloud of gas and dust in space where stars are born.
- 11. matter Invisible substance that makes up most of the universe’s mass.
- 14. The path the sun appears to take through the sky over the year.
- 17. The stretching of light waves as objects move away in space.
- 19. horizon The boundary beyond which nothing can escape a black hole.