Astronomy Terms

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Across
  1. 6. a natural satellite of any planet
  2. 8. Relating to the universe or cosmos
  3. 10. A cloud of gas and dust in outer space, visible in the night sky
  4. 11. Consist of electrically positive protons and electrically neutral neutrons.
  5. 12. the curved path of a celestial object or spacecraft round a star, planet, or moon
  6. 13. The creation of new atomic nuclei
  7. 15. afixed luminous point in the night sky
Down
  1. 1. A notional boundary around a black hole beyond which no light or other radiation can escape.
  2. 2. all existing matter and space considered as a whole
  3. 3. a celestial body moving in an elliptical orbit round a star
  4. 4. The rapid expansion of matter
  5. 5. An essential or characteristic part of something abstract.
  6. 7. A proton or neutron
  7. 9. a system of millions or billions of stars
  8. 14. Relating to a star or stars.