The universe

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Across
  1. 1. massive and extremely remote celestial object
  2. 3. a celestial object, thought to be a rapidly rotating neutron star
  3. 5. Earth's only natural satellite
  4. 7. A planet that orbits a star outside the solar system.
  5. 8. a powerful and luminous explosion of a star.
  6. 10. A system of millions and billions of stars, together with gas and dust
  7. 11. An object consisting of ice and dust
  8. 12. Earth's only natural satellite
  9. 13. an astronomical object comprising a luminous spheroid of plasma held together by its gravity.
  10. 14. Earth's only natural satellite
Down
  1. 2. matter consisting of elementary particles which are the antiparticles of those making up normal matter.
  2. 4. a celestial body distinguished from the fixed stars by having an apparent motion of its own
  3. 5. A meteoroid is a small rocky or metallic body in outer space.
  4. 6. A group of stars forming a pattern
  5. 9. A small or large rock orbiting the sun