The Universe Crossword

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Across
  1. 2. A colourless, odourless and highly flammable hydrocarbon gas.
  2. 4. The totality of all space, time, matter, and energy.
  3. 6. An astronomical event that occurs when the moon or a planet moves into the shadow of another body or has a different body pass in front blocking light from reaching it.
  4. 7. An object that orbits a larger body in space.
  5. 10. Energy that travels through space.
  6. 12. A shape defined by a flattened circle with two focal points.
  7. 13. A small solar system body made of frozen gases, dust, and rock that orbits the Sun that also leaves behind two trails: an ion trail and a ice trail.
  8. 14. Rocky or metallic remnants left over from the formation of our solar system.
Down
  1. 1. Tiny solid grains of matter that float in space.
  2. 3. A layer of gases surrounding a planet held in place by gravity.
  3. 5. A visual representation of celestial bodies or distances.
  4. 8. The invisible force that pulls objects with mass toward each other.
  5. 9. An object that has once in its life orbited something.
  6. 11. A luminous interstellar cloud often acting as a star-forming region or a remnant of a dying star.